My antivirus program, Nod32, is detecting an infected file, but I am not able to delete it. The name of the file is called pmnkl.dll located in C:windowssystem32 folder. When I try to delete it, it says that the file is in use by another program, so I am unable to delete it. I tried restarting in safe mode, but I still can't delete the file with the same error message. I tried using Hijack this and Killbox to delete the file also at startup, but they dont' work as well . Does anybody know how to solve my problem? Thank you very much.