Hi:
Thanks for the update.
Thanks for the Speccy log -- we'll need to wait for someone expert in hardware issues to review it in detail.
In addition to the advice above....
1) ...your MBAM scan detected a
LOT of PUPs. While they are not malware,
per se, they can slow down a system and many will eventually get the computer into real malware. I suspect that there may already be bonafide malware (or remnants thereof) on the system, given the number of PUP detections.
It would help if you could please ATTACH the MBAM Scan log to your next reply, so that we can see what it found/cleaned.
Additional malware scanning/removal might be needed at some point.
2) Getting back to hardware, your specs look plenty robust, so Win7 should not be sluggish. I'll defer to the others who are more expert in that department, e.g. running Seagate's disk diagnostic tools (SeaTools).
But, for starters: Did you run CHKDSK C:/r on your drive, as explained
HERE?
3) The previously requested 2 logs from FRST would be most helpful, to help determine possible software conflicts, excessive programs in the startup folder, malware or malware-related changes, and other issues. It is non-invasive and only takes a few minutes to run. Explained
HERE.
Attaching those 2 logs (FRST.txt and Addition.txt) would help us to better help you.
4) I understand that you ran Windows Disk Cleanup. It is not particularly thorough, especially for temp files.
Did you also run a 3rd-party temp file cleaner, such as CCleaner or TFC?
5) Finally, just checking to be sure the system fully updated with at least all critical and important patches.
When you open Windows Update and run a manual check for updates, does it tell you that the system is up to date?
That's all I have for now.
Thanks,
MM