clean a infected file?

Question

Does the antivirus software has clean the infected file. does that means it is 100% of original file ?

thanks for answering. please provide me some reference

Answer 1

When a virus infects a file. It inserts it's signature in the file such that every time the file is loaded, the scripts run the viral script. When an anti-virus program cleans the files, it removes these signatures and TRIES not to replace any details of the original file. In case the antivirus knows what it is doing then the file becomes 100% same of the original file but when new viruses are cleaned there is no gurantee that 100% of the file is got back. Even though the file resembles the original file, it may lose some details that one may deem unimportant. It could even in some cases be completely destroyed as the virus can destrot the data of the infected beyong recovery by actually overwriting data on the infected file.

Answer 2

Yes, it can be.

Most of the antivirus works on a simple algorithm on which they first backup the original infected file by creating a copy of it (excluding the virus code) and then delete the original file and paste the backup copy instead of the original.

This technique works quite well however some times this might damage the original file. In such cases you need either to reinstall the application that was infected or replace the original file by downloading it again.

If you doubt the file genuinity you can check its version from the file properties.

Answer 3

if ure not sure, search for the infected file on your computer. find where it is located, write down its name, search for the same file on another computer, copy that file, and use it to replace the infected file of your computer. It worked for me!

Answer 4

that's many times because of the fact the virus has hidden itself on your equipment fix folder which anti-virus programmes can not get entry to. you could prepare off equipment fix (initiate > upload-ons > equipment procedures > equipment fix > Settings) then enter "risk-free Mode" by consistently pressing F8 on boot up. Run your anti-virus programme returned (and as quickly as extra for luck) as properly as any anti-spyware programme you're growing to be and then reboot as conventional. This frequently removes any nasty an infection. in case you recognize what an infection you have you will locate decision procedures for destroying it on you anti-virus internet site, they'd have a definite device for particulary nasty infections. do no longer overlook to coach on equipment fix returned and if think approximately rid of the virus create a fix factor so in case you're contaminated returned you could bypass returned to a sparkling device.