HOI: tvha219@hcm.vnn.vn
Co mot ban da chi cho minh cach phat hien, diet virus trojan la vao Msconfig\Startup. Neu co muc Wcheckup thi bo danh dau va vao trong Dos de xoa tap tin nay. Ban nao biet thi giai thich cho minh biet voi, Cam on nhieu

DAP: tanlinh@saigon.vnn.vn
Cach nay chi diet duoc moi mot con la con barok 1 va 2.0 ngoai ra voi cac laoi trojan khac thi khong co hieu qua. Thu hai ten tap tin Wcheck co the duoc doi theo y muon cua nguoi cai trojan. ban can xem xet cac file nghi ngo chu khong dua tren ten. Chang han ban kiem tra msconfig thuong xuyen neu dot nhien thay co dong lenh la ngay lap tuc ban phai kiem tra file do do dau ma co.
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HOI: andylau@tlnet.com.vn
Cho minh hoi ,lam the nao de goi phone tu nuoc ngoai ve dien thoai di dong o VN  ??? ( Vi du nguoi ban o My goi ve VN qua so dien thoai di dong 090xxxxxx )
Cam on nhieu

DAP: tong_hop@yahoo.com
goi : yyy 84 90xxxxxx
yyy : ma so goi quoc te cua nuoc do
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HOI: stinger-rwcmta@excite.com
Xin cho hoi : Toi co nghe noi la co mot phan mem lam mat CPU Dieu nay co the thuc hien duoc khong ? Toi khong hieu lam sao ma mot phan mem khi chay lai co the lam mat phan cung? Ban nao biet, xin giai thich giup. Cam on cac ban truoc nghe.

DAP: tanlinh@saigon.vnn.vn
Tui co phan mem waterfall co the lam duoc viec ay,  neu ban can tui goi tang. Con no lam viec ra sao u? Y tuong cung kha don gia. Chuc nang dieu cho phep ban cai dat gia tri ta?i toi da cua CPU. Noi cach khac, ban co the lam cho CPU chay voi mot ti le nho so voi kha nang thuc cua no (vi du 50%, 60%, 70%, v.v.). Bang cach nay, phan con lai se khong bao gio duoc su dung den, va luon trong tinh trang nghi ngoi, va nhu vay no se khong phat sinh nhiet giup cho CPU khong bi nong
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HOI: atai_2@vnmaster.com
Chao cac ban. Cac ban cho minh hoi lam cach nao de luu cac file update virus cua NAV 2001 (do phan Auto Upgrate cua chuong trinh NAV tu dong cap nhat cac Update virus nen minh muon luu lai cac cap nhat do phai lam sao). Xin cam on truoc.

DAP: tuanvinh@softhome.net
Ban nen vao phan Temp cua Windows luc no dang cap nhat. Ngay sau khi vua Updated xong thi ban copy luon file do vao o cung. Thuong no la mot file *.cab.
Chuc thanh cong!
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HOI: tuanpd@yahoo.com
Xin  ho?i  ca'c  Ba.n, Ba.n  na`o  bie^'t ca'ch la`m the^' na`o dde^? co' the^? gu+?i thu+ to+'i ho^.p thu+ mi`nh ca^`n ho?i (cu?a LH) nhu+ng kho^ng muo^'n nha^.n thu+ ve^`, chi? ca^`n xem qua Web. Tha^n  Me^'n.

DAP: Nhu vay co nghia la ban chi muon "huong thu" ma` khong muon "lao dong", rat tiec la khong co cach nao "sung suong" nhu vay. don gian nhat (nhung cung hoi "mac cong" la su dung bo loc cua trinh duyet mail de chan thu tu cac hop thu goi cho ban.
Hy vong trong HT co rat it cac thanh vien giong nhu ban  - neu khong chac HT se "chet yeu" mat.
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HOI: songan@fpt.vn
  Ban than quy, Cam on nhieu. Nhung... toi tu gioi thieu, nam nay 65 tuoi, nha van, rat dot vi tinh. Toi da vao efax.com nhu ban chi, da sing up, da nhan duoc congratulation qua OE cua toi. Toi cung da download efax messenger (khong download efax messenger plus ) nhung sau do toi khong biet lam the nao de gui Fax qua email. Toi co mot so thac mac mong ban chi giup:
  _ Trong phan sing up khi dang KY so fax nhan tai sao chi co US va UK ?
  _  Minh co phai tra tien dien thoai qua My khong? Neu phai tra thi chac chet!
  _ Tai sao trong Printer cua toi van chua hien ra Printer cua messenger plus?
  - Ban chi giup that chi tiet bay gio toi phai download cai gi va lam gi de gui fax cho nhung may fax o trong nuoc ? Khi gui thi qua e-mail nhung nguoi nhan lai nhan bang may fax kia. Toi co phai tra tien dien thoai tu PC cua toi toi trung tam service cua efax khong?
  Co gang giup nguoi nhieu tuoi ma me vi tinh va tien nghi thong tin hien dai nhe.
  Rat cam on. Chuc nam moi hanh phuc.
  Song An

DAP: alann@hotmail.com
Chao bac, bac co ten "Song An" giong nhu ten Thay day Vat Ly hoi xua cua chau o Nha Trang ay.  De chau giai thich so so 1 ti' ve Internet Fax.
Internet Fax neu muon xai, truoc het minh phai noi vao mang truoc, sau do vao cai Trang website, roi moi goi cai file cua minh vao cai Trang do, de ho goi di toi cai may Fax nao do' ... (tuc la giong nhu minh ta?i (upload) file cua minh len Web vay!).  Du sao di nua bac phai dung dien thoai de noi vao mang, dung khong? ton tien dien thoai, roi tien noi mang nua, eo oi!  Co cai bat tien va co cai thuan tien, nhu sau:
Bat Tien:
1) Phai ton thoi gian cho doi de goi di mot cai Fax, du cai Fax rat ngan. Neu Fax dai, va co hinh anh, thi tra tien noi mang dai dai.  Khong phai muon Fax la Fax duoc lien giong nhu cai may Fax de ban.
2) Ben VN chua co nhung dich vu Internet Fax, chi thong dung ben My va mot vai nuoc Chau Au, doi khi bi Firewall, ngan ngua, oi thoi du ca, muon vo duoc mot cai, lam luc ngoi doi dai co ra.
3) Cai file hinh anh, hoac cat tu bao chi ra, phai Scan vao may computer roi moi goi duoc, file giong anh chup thi rang cho hoi lau 1 ti', hau qua tien bac thi Bac hieu roi nhe'
4) Tien dien thoai thi nhat dinh bac phai tra roi.  Nhung chau da noi phia tren, eFax la internet Fax, chu khong phai la may Fax binh thuong, bac phai noi mang moi xai duoc.  Thi di nhien bac phai tra tien dien thoai noi vao
mang (trong nuoc) + tien dich vu Internet.  Bac xai FPT thi bac phai tra tien quay so tu nha bac toi dich vu FPT, dung khong?  hieu roi nhe'.
Thuan Tien:
1) Xai Internet Fax thi khoi phai tra tien dich vu Fax (neu internet fax la mien phi), du dich vu nay co o tren Cung Trang cung khoi phai lo.  No lam viec giong nhu minh goi mot cai email toi dich vu Fax, roi no tu goi den noi, den chon cho minh.  Con chuyen lam sao no chiu phi ton nhu vay, minh dau them biet lam gi.  Cho Free thi minh xai xa lang!
2) Bac co the goi mot cai Fax cho hang ta', hang tram noi khac nhau trong cung mot luc, ban mot phat chet hang tram nguoi la the! chi can bac cai so fax cua tat ca moi noi bac muon fax.  (cai nay noi chung chung thoi, moi cai eFax lam viec hoi khac 1 ti')
3) Tiet kiem duoc tien chi phi goi Fax di xa, nhu goi ra nuoc ngoai.
4) Chua suy nghi ra, nhung coi bo phan Bat Tien nhieu hon la Thuan Tien day!
Noi chung neu bac goi Fax trong Nuoc thi nen goi thang toi noi ay, dung xai Internet Fax.  Tuc la dung may computer cua minh Fax thang toi may Fax cua nguoi do.  Bac co thu qua WinFax chua?  Thuong thi Modem moi bay gio co gan them ung dung Fax, minh chi viec dung computer de quay so roi Fax cai file cua minh thang toi may Fax khac.  Nhanh hon may Fax de ban nua!  Nen nho NEU DUNG TRONG NUOC THI NEN XAI UNG DUNG FAX GOI THANG TOI MAY FAX KHAC.  Tiet kiem duoc tien dien thoai va tien noi mang.  Con thec mec gi bac goi mail
thang cho chau nhe...
Cac ban khac co y kien gi khong?
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HOI: tvha219@hcm.vnn.vn
Minh co len trang Web cua Kim Smith, roi vao cac gallery. Khi minh nhan chuot phai de save picture lai thi xuat hien thong bao rang anh nay co ban quyen, lenh khong thuc hien duoc: "sorry, that function is disabled. These images copyrighted. (c) 2000 Cyber nation Online ALL RIGHTS RESERVED."Minh da thu danh dau hinh roi nhan Ctrl+C, roi dan vao mot ung dung khac, hay dung nut Print Screen de cat ca man hinh desktop roi  dan vaodung trinh xu ly hinh anh de cat bot nhung vi hinh lon qua,neu dung cach do thi se khong lay duoc het anh. Cac ban chi cho minh cach de lay anh do voi, cam on cac ban nhieu.

DAP: tutorvn@yahoo.com
Ngoai cac cach moi nguoi tra loi (nghia la 1/ save trang web duoi dang complete thi se save tat ca hinh 2/ hoac la view source de xem dia chi cac hinh de download). Toi con cach khac la thay vi Rclick chuot, ta co the an phim "Application" (nhu MS goi), phim nay ke phim Ctrl phai tren ban phim 104keys. Phim nay se mo shortcut menu tuong tu right click (nhung truoc do ban phai chon doi tuong). Cach nay cung dung de xem source rat rat de dang.
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HOI: hoangconuong@yahoo.com
May' anh cho em hoi~ 1 ti' ti, OE5 cua~ em luc' truoc' ( truoc' khi cai` lai Win ) van~ tao nen` , tao font va` colour cho mail , gio` sao ko duoc nhu vay. Hinh` nhu co' thuoc tinh' nao` em chua cai` thi` phai~, neu' co' the~ hay~ giup' em . Thanks nhieu` nhieu` lam' !!!

DAP: tutorvn@yahoo.com
Tru+o+'c he^'t, cha('c cha('n ra(`ng ba.n cho.n format la` RichText (HTML) chu+' kho^ng pha?i da.ng plain.
Sau ddo' ba.n va`o Option/Compose va` check ca'i Stationery/Mail va` cho.n Stationery phu` ho+.p, ro^`i muo^'n font chu+~ ma`u me` cu~ng va`o Compose ma` cho.n Font gi` ddo'. Sau na`y khi ba.n soa.n thu+ no' se~ tu+. ddo^.ng a'p dda(.t va`o.
PS: ba.n ne^n vie^'t ho?i nga~ cho ddu'ng
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From: hunglx@fpt.vn
Can trong voi virus Word va Excel 97 Macro
Cong ty phat trien phan mem diet virus Sophos cho biet ho da phat hien ra hai virus macro "trong the gioi hoang da".
Virus thu nhat thuoc dong ho Word 97 macro Class.FE. Virus nay hoat dong khi mot van ban bi nhiem duoc nguoi dung dong lai vao ngay 26/1, luc do virus hien thi mot hop thoai voi tieu de "Face of Evil" (Bo mat cua Quy du) va hien thi 15 lan thong diep ReT}{@SoFt Inc Lda 87/99.
Virus thu hai la mot bien the moi nhat cua loai virus da tung duoc moi nguoi biet den Excel macro Barisada. Virus nay co ten goi la Barisada.N, thuong dat doan ma lenh pha hoai trong mot file co ten goi la HD.XLS. Vao ngay 25 moi thang, virus se hien thi mot hop thoai voi doan van ban co noi dung nhu sau:
"Question : Hyundai Unicorns left from Incheon, What do you think of it?
Answer : Hyundai is SOB ".
Neu nguoi dung chon nut "Yes" thi mot thong diep se hien ra:
"Good! You're pretty good guy!!".
Neu nguoi dung chon "No" thi se nhan duoc thong bao:
"Oh! no, Next question is last time for you".
va sau do mot thong diep khac xuat hien:
"We do not buy Hyundai's product, is it right?".
Neu tra loi "Yes" mot doan thong diep tiep theo se hien ra:
"You got it! You have right answer".
Neu nguoi dung tra loi "No" thi virus se bao:
"Wrong Answer, Your file will be deleted! You are SOB, too."
Sau do virus nay se xoa tat ca cac dau muc trong danh sach lam viec tai may tinh cua nguoi dung.
Worm hay la Trojan ?
Worm va Trojan (Sau va Ngua To roa) la mot trong nhung moi de doa lon nhat doi voi cac may tinh. Gan day, hai loai nay da xuat hien day ray trong hop thu dien tu cua nguoi dung. Trong khi Worm (sau) la cac doan ma nguy hiem thuong pha hoai may cua ban, thi Trojan (ngua) lai duoc su dung chu yeu de tan cong vao cac may tinh khac. Vi vay, ban can phai phan biet ro rang dac diem cua chung, cung nhu cach thuc de phat hien va ngan ngua hai loai nay. 
Worm (Sau)
Mac du Worm da xuat hien cach day tu rat lau, song gan day chung moi lay lan rong nho viec su dung Internet va e-mail cua nguoi dung ngay cang nhieu. Loai "sau" nay khong xuat hien tren nhung mo rau, tuy nhien phan nao no cung "nhung nhuc" nhu sau that. No den cung voi cac file dinh kem mot buc thu gui cho ban va se thuc su hoat dong khi ban mo cac file dinh kem. Sau do, "sau" duy tri doi song cua minh bang cach lay nhiem vao cac may tinh khac thong qua e-mail hoac qua mang. Su xuat hien cua cac loai sau nhu I Love You, Lifestages va Navidad da cho thay su gia tang dang so va kha nang lay lan rong rai tren the gioi cua cac loai sau nay.
Navidad mang mot e-mail ngau nhien tu mot hop thu nguoi dung da bi lay nhiem va gui buc thu nay den tat ca nguoi nhan. Melissa lay nhiem vao khoang 1,2 trieu may tinh ca nhan trong vong nhieu gio truoc khi phan mem tim diet duoc phat hanh. Do la ly do tai sao cac phan mem diet virus rat kho phat hien ra cac loai worm moi nhat. Tren thuc te, cac cong ty diet virus thuong cap nhat ban nhan dang virus hang ngay va dua len Website cua ho de nguoi dung co the tai xuong.
Phan lon cac loai Worm lay nhiem tren cac ung dung nhu Word, Excel hay Outlook. Cac Macro la moi truong tot de worm co the nhan ban. Outlook 2000 ho tro HTML cang lam cho chuong trinh nay co nhieu diem yeu, de bi cac ung  dung HTML tan cong. Worm hoat dong trong cac file nhu regedit.exe, danh lua registry he thong cua ban va pha hoai may tinh cua ban. Chung co the cung chui vao autoexec.bat va vi the no se duoc kich hoat moi khi ban reboot hoac khoi dong lai may.
Tu bao ve may tinh cua ban
Ban diet virus cap nhat va moi nhat chinh la phuong tien ngan ngua worm huu hieu doi voi may tinh cua ban. Vi the ban nen quet cac file dinh kem e-mail cua minh truoc khi mo chung. Day la buoc bao mat co ban nhat ma ban nen thuc hien de tranh cac loai worm. Vi phan lon cac loai worm deu su dung cac doan ma lenh, nen ban co the xoa cac Active Scripting trong e-mail de ngan chan cac doan ma lenh thuc hien cong viec pha hoai. Ban co the thuc hien viec nay cho Outlook va Outlook Express bang cach xoa muc Active Scripting trong trinh duyet Internet Explorer.
Trojan Horse (Ngua To roa)
Chung ta khong noi ve truyen thuyet Ngua To roa cua nguoi La Ma co ma chung ta dang de cap den mot chuong trinh lay ten cua truyen thuyet nay. Trojan (ngua) la mot chuong trinh co ve nhu la mot ung dung tot, tuy nhien no lai thuc hien nhung viec lam xau xa mot cach lang le. No co the pha huy bang FAT (File Allocation Table) trong o cung cua ban, hoac danh cap cac thong tin ca nhan cua ban va gui nhung thong tin nay den mot noi nao do. Bang cach thuc hien chuong trinh nhu the nay, mot hacker co the nam quyen dieu khien may chu va truy cap duoc vao may tinh cua ban. Mot may tinh bi dieu khien co the  la phuong tien de cac hacker su dung vao bat ky mot muc dich xau xa nao. Tren phuong dien ky thuat, Trojan co quyen dieu khien he thong nhu nguoi
dung. Mot ten hacker tu xa co the chua hoac xoa file, cai dat phan mem, dieu khien tu xa... Va Trojan thuong danh cap mat khau va cac thong tin dang nhap he thong de gui ve cho hacker.
Gan day, chung ta da nghe noi nhieu ve cac Website Internet bi tan cong theo kieu Tu choi Cung cap Dich vu Phan tan. Cac hacker da su dung Trojan de thuc hien cuoc tan cong nay. Bang cach dieu khien hang nghin may tinh bi nhiem Trojan truy cap vao cung mot site tai mot thoi diem, lam cho may chu Website bi qua tai va khong co kha nang dap ung phuc vu nguoi dung. 
Chung lay nhiem nhu the nao ?
Thuong thi Trojan duoc gui qua cac file dinh kem e-mail, nguy trang duoi dang mot phan mem hop phap. Khi nguoi nhan mo file dinh kem nay, Trojan se tu cai dat vao he thong. He thong may tinh bi nhiem luc nay thuong duoc goi la "Zombie", tuc la da bi hacker nam quyen dieu khien. Mot vai hacker da liet ke danh sach cac may tinh bi nhiem len Website de giup cac ten hacker cung chi huong thuc hien am muu pha hoai. Mat khac, cac ten hacker co the dung cac may chu Trojan cua minh de quet tim cac may tinh bi nhiem. Trojan cung co the duoc chuyen qua cac Website tuong tu nhu cach thuc dat cac Cookie.
Tu bao ve chinh ban
Cach thuc don gian va hieu qua nhat de chong lai Trojan la phan mem tuong lua ca nhan. Cac phan mem tuong lua nhu ZoneAlarm hay Norton Personal Firewall co the ngan chan cac ket noi ra ben ngoai tu Trojan co trong he thong, va cung chan cac ket noi vao trong may tinh tu cac may chu bi cac hacker dieu khien.
Tuy nhien, neu Trojan duoc tao ra de pha hoai cac file cua ban thi no se hoat dong ma khong can ket noi ra ben ngoai. Trong truong hop nay, ban can ngan chan su xam nhap cua chung bang cach kiem soat e-mail cua ban xem chung duoc ai gui den. Giai phap don gian nhat la ghi lai (save) cac file dinh kem va quet chung bang cac phan mem tim diet moi nhat truoc khi mo chung ra. 
Bien the virus Melissa lay lan duoi hinh thuc van ban 
Cac chuyen gia virus may tinh cho biet mot bien the cua virus Melissa dang lay lan tren the gioi, hien nay dang nup duoi dang mot van ban Microsoft Office danh cho may Macintosh.
Vincent Gullotto - Giam doc Network Associates - noi rang loai bien the nay da duoc dua den trong phong thi nghiem cua ong ta mot thang truoc day. Tuy nhien, trong hai ba ngay vua qua, hang ta bao cao ve virus nay da don dap gui ve.
Cung giong nhu cac bien the virus Melisa khac, virus nay se tu nhan ban de lay nhiem rong. Cac van ban Microsoft Word duoc tao ra tu may tinh bi nhiem se mang virus nay, va khi virus nay nam trong may tinh co su dung Microsoft Outlook, no se gui 50 ban sao chinh no den cac dia chi co trong Address Book.
Virus nay con duoc goi la Melissa-X hoac Melissa 2001, no co the lay nhiem tren may PC hay Macintosh. Tuy nhien, cung giong nhu cac bien the Melissa khac, virus nay chi gui duoc cac ban sao cua no tren cac may PC su dung Windows. Cho den nay, file dinh kem cua virus nay xuat hien duoi ten goi "anniv.doc". Gullotto da canh bao la file nay co the thay doi ten goi.
Mac dau loai virus moi nhat nay khong nguy hiem hon cac bien the Melissa khac, nhung nguoi dung nen cap nhat cac ban nhan dang loai virus nay khi lay nhiem vao van ban.
Gullotto noi rang boi vi day la mot bien the cua Mellisa, nen no phai duoc xep hang la loai virus nguy hiem mac dau muc do nguy hiem cua virus nay chi xep hang trung binh.
Gullotto noi them: "Chung toi dang rat quan tam den loai virus moi nay cung giong nhu cac loai truoc day. Chung toi khong muon lam moi nguoi hoang so vao thoi diem nay."
Cho du rat kho doan nguon goc xuat hien cua virus nay, nhung Gullotto noi rang rat co the mot nguoi nao do da ghi van ban co chua Melissa vao phan mem Microsoft Office su dung cho may Macintosh, lam tao ra loai bien the moi nay. Ong ta noi ca hai may tinh Macintosh va Windows deu co the mo duoc file van ban cua nhau.
Gullotto noi rang ong ta da thay loai bien the nay mot thang truoc day. Virus Melissa nguyen ban duoc phat hien vao thang Ba nam 1999.
Theo Internet today  /Vnn.vn

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