Several of these viruses consist of pieces of assembly code that is encrypted multiple times. Counter measures Infected DLLs can be hard to clean from the system because applications map these files from the disk to memory, and you can't modify these files once they load. To use SFC, type sfc.exe from the command prompt. SFC is not a virus security feature, but it helps reduce the risk of spreading viruses under Win2000. Prevention includes creating user awareness, implementing hygiene rules, using disk authorization software or providing isolated 'quarantine' PCs.
Detection involves the use of anti-virus software to detect, report and disinfect viruses.
See the Simply the Best Anti Virus page for programs. Containment involves identifying and isolating the infected items. Recovery involves disinfecting or removing infected items and recovering or replacing corrupted data. The first step in detecting a virus in a file is to search for a unique piece of its code or of its data within files. This method is used for simple viruses.