They aren't virus or malwares.
Svchost.exe is a system process. See It: http://support.microsoft.com/kb/314056/en-us
The process wmiprvse.exe (wmiprvse mean Microsoft Windows Management Instrumentation) is a generic process that allows the management of clients under Windows XP. Starts during the first connection from a client application and can monitor system resources.
It seems that files being infected.
Run a anti-virus or anti-spyware/malware