But it needs me to turn off system restore
It's a normal operation for cleaning infections...
If you find a virus keeps coming back after you delete it, it's most probably infected the System Restore folder, the best way to solve this is to disable System Restore, reboot your machine and then enable it again. After all, run a full avast! scanning. System Restore cannot be disabled on Windows 9x and it's not available in Windows 2k.
Enable/Disable System restore on Windows ME:
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q264887Enable/Disable System restore on Windows XP:
http://support.microsoft.com/default.aspx?scid=kb;%5BLN%5D;310405Windows attempts to protect files that are deleted from the system folders (just in case it was an accident), so they can be restored if required.
The problem is many malware writers are wise to that and put their files in the system folders, this is also done to confuse you into thinking you could be deleting an important system file. Disable system restore, reboot, scan and if clean enable system restore again.
and run in safe mode
SafeMode (repeatedly press F8 while booting):
http://support.microsoft.com/default.aspx?scid=kb;en-us;315222i'm not that confident as i have never done either before, could i potentially damage my computer, or delete loads of files, programs and settings?
I won't be that worry... anyway, don't go so further and follow the instructions. Good luck.