What we can do if system was infected by Virus

"The only way to absolutely, positively clean a machine from a virus is to completely reformat the machine and reinstall the operating system, updates, applications and data from scratch."

It's simple really: consider the possibilities after you're infected with a virus:


1. Your anti-virus program successfully cleans it off.

2. Your anti-virus program thinks it successfully cleans it off, but in fact the virus has hidden itself so well that it remains. You're still infected, and you don't know it.

3. Your anti-virus program doesn't catch it and doesn't even try to clean it off. You're still infected, and you don't know it.

4. Your anti-virus program fails to clean it off and tells you. You're still infected, but at least you know.

Not Satisfied with the above , please try below steps and check:

1. As soon as you suspect that your computer has a virus , remove your computer from any networks it might be on, as well as from the Internet, so that you don't inadvertently spread the bug to others. Unplug your network cable if you have to.


2. If you have virus-scanning (anti-virus) software installed, run it.


3. If you don't have anti-virus software, you'll need to obtain some. If you can't get it from a network administrator or download it from an uninfected computer, you can mail-order it from a retailer


4. Start your computer (still not connected to a network) and follow the instructions that came with the anti-virus software.


5. Keep running the virus-scanning software until your computer comes up clean.


6. Reconnect your computer to the Internet and check with the anti-virus software's publisher to make sure you have the latest updates. If not, download them now.


7. After updating the anti-virus software, run it again until your computer comes up clean.