Brittney,

I do not see a reason so far as to why you would be getting this error.

I would recommend to stay away from using registry cleaners though. They tend to cause more problems than any very little benefit that you might get from them if allowed to clean without manually verifying that each item is safe to delete.

You can try the items listed in below to see if they may be able to help improve your computer's performance. If not, then you might consider doing a clean reinstall.

Optimize Windows 7