Computer Learning

[Newly2b]

Been having problems on my old XP rig for a while now (slow) -- been using 100% of CPU but can't seem to put my finger on the cause (conflicts??). Won't allow restore, won't download any programs or updates, wiped out my favorites in Firefox and now slowed to a snail's pace. I'm probably infected with something but none of my scans can find anything. Ran PCPitstop, nothing! I believe I shall have to wipe the HD this weekend and start all over. I am thoroughly disgusted but not ready to go buy a new rig just yet!

Flo, any suggestions as to best scanning software to use after my clean install, best antivirus program to monitor my system (using Avast)? Any other suggestions (no, I'm not going to Win10, LOL)?

TIA

Newly