Oh, bummer...then I dunno. If it's not a virus, not malware, not registry or browser issue, I'm stumped. But I'm no guru..

My cheap laptop is about 6 years old and I find that I have to wipe it back to factory settings and reload programs about once a year. If I do that, everything runs really fast for awhile and then, after awhile, none of these utilities will fix the lagging and otherissues that begin to reoccur. So another reset fixes the problem again.

If you have everything backed up on the cloud (or a separate hard drive), this is a quick and easy process. I immediately reload the anti-virus stuff but I just reload a program when I first need it again. Since most of the programs I use are cloud-based, I have few to reload.

Hope some of this is helpful.