Recently my sys was affected by some tengo virus. Kaspersky detected it and disinfected around 25 files mostly from \system32 directory. But I think that kaspersky deleted/modified those files instead of cleaning them. Now even files like cmd.exe, calc, spider, solitaire, etc. cannot be found. I copied some files from \servicepackfiles\i386. But how do I automatically restore sys files? I use XP + SP2. Which cd will be required for restoration of files?