Hiya Csambo

The file you listed 'vsfilter.dll' appears to relate to VirtualDub. This may be the program causing the problem.
You may want to try their official site first, to check if anyone has similar problems. There may also be a newer version of the file for download that may correct the problem

http://www.virtualdub.org/
If you still need assistance after checking the official site, please let us know

Regards.
DJM.
Edit: Correction, it appears more likely to be a video codec:
http://www.google.co.uk/search?hl=en&q=vsfilter.dll&meta=