|1st of all, are you paying for those programs?|
reg cure,reg mechanic
If not, they are giving you false positives trying to coax you into buying their software.
You may want to give FREE Ccleaner slim and run the registry cleaner. It will clean up the registry
I would also suggest that you do numerous spyware and virus scans, spyware will grind a PC to a hault.
You could have an overheating problem or your memory sticks may have gone bad, we don't know how old your PC is.
Some HELP in posting on Computing.net plus free progs and instructions Cheers