5 buoc tu phong chong virus USB hieu qua

Ban co mot chiec USB? Cho du ban chi thinh thoang su dung no de sao chep tai lieu giua cac may thi chac rang khong duoi mot lan chiec USB cua ban da nhiem phai virus.

Co le cung khong phai noi nhieu ve nhung phien toai ma ban gap voi voi nhung con virus dang ghet nay. Tuy nhien ban hoan toan co the han che nhung vi khach khong moi nay xam nhap vao chiec USB cua ban.

Hay thu click chuot phai vao bieu tuong o USB, neu nhu ban thay co dong Autoplay duoc to dam o vi tri tren cung, co nghia la 90% USB do da bi nhiem virus. Boi vi binh thuong thi dong chu to dam ay phai la Open hoac Explorer thay vi Autoplay.

Va moi khi ban USB nay duoc dua vao mot may tinh khac, virus loi dung thoi quen so ho cua ban moi khi click dup vao bieu tuong o dia USB trong My Computer de xam nhap. Tai day chung tiep tuc nhan ban va phat tan chinh minh bang nhieu duong. Va duong nhien nan nhan tiep theo se la nhung chiec USB khac cam vao may.

Tai sao virus co the lay nhiem qua USB? La boi vi virus sao chep chinh no len USB, va tao mot file Autorun.inf de kich hoat tinh nang Autoplay cua o dia. Moi khi ban click vao de mo USB thi ban se vo tinh chay chinh con virus nay. Them nua, chung khon kheo dat thuoc tinh an cho chinh minh de tranh bi phat hien.

Lam the nao de co the phat hien ra duoc USB co virus hay khong? Neu nhu binh thuong ban mo USB bang cach click chuot trai vao bieu tuong USB o My Computer thi hay thay doi thoi quen do. Hay thu click chuot phai vao bieu tuong o USB, neu nhu ban thay co dong Autoplay duoc to dam o vi tri tren cung, co nghia la 90% USB do da bi nhiem virus. Boi vi binh thuong thi dong chu to dam ay phai la Open hoac Explorer thay vi Autoplay.

Dieu nay con co the ap dung voi cac o dia cung, mot vai con virus sau khi lay vao may con lay vao Autoplay cua cac o cung. Qua trinh lay vao o cung khien cho virus van co the duoc kich hoat ma khong can phai sao chep vao Start Up, mot noi van thuong xuyen duoc kiem tra. Tuy nhien, cac virus USB thuong tu dat no trong trang thai an, chinh vi vay tot nhat ban nen thuong xuyen dat che do xem cac file an bang cach vao My Computer -> Tools -> Folder Options.. -> View -> Chon Show hidden files and folders va bo Hide protected system files.

Tu bao ve minh nhu the chua du. Tot nhat hay bao ve USB cua minh khoi bi nhiem virus. Ban hoan toan co the tu lam duoc ngay ca khi ban khong phai la mot nguoi am hieu ve may tinh.

That vay, neu nhu virus lay vao USB  cua ban va tim cach lua ban chay no qua tinh nang Autoplay cua USB thi tai sao ban lai khong thu lua lai no. De y rang virus USB nao cung tao file autorun.inf, vay thi ban hay tao san file autorun.inf trong USB cua minh. Chac chan rang chi voi buoc nay ban da “qua mat” duoc kha kha virus USB roi.

Nhung xem ra nhu the van chua du, ban can phai cam cac con virus thong minh hon ghi de file nay. Dieu nay ban cung hoan toan co the lam duoc de dang voi USB neu nhu ban chuyen he thong file cua USB sang NTFS va dat quyen cam ghi de cho file autorun.inf.

Tat nhien viec chuyen he thong files sang NTFS thi USB cua ban se khong the dung duoc tren Windows 98/ME, nhung chac rang Windows 98/ME thi cung khong tu dong nhan duoc USB cua ban, hon nua Windows 98/ME hien nay cung hoi hiem thay.

Khi ban da san sang, hay bat dau bao ve USB cua ban qua nhung thao tac don gian voi Windows XP qua 5 buoc sau:

Buoc 1: Xac dinh ten o dia USB cua ban la gi bang cach click vao My Computer va xac dinh o USB. Vi du nhu USB cua ban la o E: va nhan la STORAGE

Buoc 2: Chuyen doi he thong files sang NTFS bang cach Click vao Start -> Run, sau do go convert : /FS:NTFS. Vi du ban se phai go convert E: /FS:NTFS . Luu y, neu o USB cua ban co chuc nang ghi am va nghe nhac MP3 thi nen bo qua buoc nay. Neu khong, co the phan mem choi nhac cua ban se khong the chay cac file MP3 duoc.

Buoc 3: Tao mot file autorun.inf voi noi dung bat ki, tham chi de trong cung duoc va copy vao thu muc goc cua o dia USB cua ban.

Buoc 4: Click chuot phai vao file autorun.inf ban vua tao va chon thuoc tinh cho file nay la read-only, ban cung co the chon them hidden.

Buoc 5: Cam moi quyen truy xuat vao file autorun.inf ban vua tao bang cach Click vao Start -> Run, sau do go cacls \autorun.inf /D Everyone. Vi du nhu ban se go cacls E:\autorun.inf /D Everyone

Tat nhien la khong the noi la an toan voi tat ca cac loai virus USB, nhung phuong phap nay cung phan nao giup cho USB cua ban an toan truoc dai da so chuyen lay qua USB hien nay. Va hon het, hay cai len may cua minh mot chuong trinh diet virus dang tin cay, dac biet nen co tinh nang tu dong cap nhat thuong xuyen. Chuc ban thanh cong.

Theo VietNamNet