Water Paper.8BF error and PC run very slow.

As i know Water Paper.8BF is a windows file for the OS that help executing dell file, right?
Recently my system being run very slow and before few days I got a Water Paper.8BF error after that I can't use some applications and also my computer became so slow and always freeze or crash.
I scanned my computer for any virus and after that i copy paste Water Paper.8BF to required directory, but i still have same problems.
