Computer keeps freezing?

My computer keeps freezing, help?

• Every time I go on my computer, it freezes. The freeze happens thirty minutes or less from the startup. I searched some stuff on the internet on how to fix it. Something about cleaning your registry stuff, adware, spyware and the like. So I went out and bought "System Mechanic", hoping it would help fix my problem. Thing is, it didn't. I did a quick scan, fixed some problems. Later on I went on my computer, kept freezing. I tried to do an in depth scan, but no luck. It would freeze while it was still scanning. I would be forced to shut down the computer the hard way, by pressing the on button and waiting for it to shut down. What's more, I did this thing on System Mechanic. Where they would get back more memory for you. Everytime I did that, I restarted the computer to make sure it had saved properly. But when I came back to check, the memory had gone down! First I had 9% and I defragmented it and it gave me 33% memory back. So I decided to restart my computer so it wouldn't freeze and save it. When I came back, not only was the 33% gone, it decreased and I only had 6% left! If you know any inexpensive ways to deal with my computer/freezing problem, please tell me. I dont want to go to professionals, they usually cost a lot. Maybe some more programs? System Mechanic obviously didn't work.

• Answer:

  try running in safemode by pressing f8 when restarting windows...ok...the dl ccleaner...its free...then run that...and dont forget to run the registry mechanic option ccleaner has...ok gl