Setup library wbemupgd.dll could not be loaded

Hello,
When I turn on my PC and everything is loaded this error appears without any reason. The thing is that I tried to make an update to my Windows XP but my PC turned off during the install. I start to think that this might be the problem. Anyone have any idea why I have this error? How can this be solved?
Thanks!

Windows Setup
Setup library wbemupgd.dll could not be loaded, or Function OcEntry could not be found.
Contact your system administrator. The specific error code is 0x7e.
