Dynamic Link Library

Hello all! Wondered if anyone could help. I've recently
started to have problems opening files (mainly image files
but sometimes text files too). When I try to open them it
takes 2 mins or so for it to actually happen. I've run
health checks and defragmented etc but to no avail. When
I'm online and try to open images previously downloaded I
have no problems. Also, the problem seems to disappear
once I come offline too. When I start up Windows I
sometimes get the following message:

RUNDLL - Error loading C:\WINDOWS\IMAGES.new
A Dynamic link library (DLL) initialisation routine failed.

OK. But what does that mean? Can I fix it? Help!

Any suggestions would be greatly appreciated.

Many Thanks, B.