OK here some tips man.
1.
go to Device manager -> Expand Universal Serial Bus controllers (It's on the Bellow of the List)
If there is a Yellow Exclamation mark in some channel u need to reinstall the software for the USB controllers.
Tips FOr reinstalling
1Right Click of the Controller u need to Uninstall .
2.Press Ok
Restart and the System boots up OS will install the USB Controller automatically.
2 Kaspersky Sometimes disable the Autoplay of the devices and cos of that some unstable systems will disable the Host controllers.
3. If not works use SYSTEM Restore facility on Windows XP.
This will solve all the Post Virus attack effects on system.
Good Luck man