I have my administrator account which i use daily and i have a guest account I have for anyone else to use. My main user account has become very sluggish and I had done a lot to figure out what the problem was. I always keep antivirus software up and running and I use Malware Bytes every so often. Nothing detected so I started piece by piece looking at hardware. Thought I had it all pin pointed to my hard drive because when my computer would be acting up the "DISK" marker for performance resource monitoring would be flipping out. Recently though I was on my guest account and ran various programs and not only did the programs respond much quicker, windows overall felt much more responsive. Having said all that I know that per user account you have different "startup" applications that run that could affect user account performance but I have almost nothing but bare minimum running at startup. Even if I am logged on my administrator account and just "switch user" to my guest (so my administrator account is still running in the background) everything runs great. Wouldn't guest be affected by performance in this case since administrator is still running in the background?