I've only had my PC for about a year now and it's been going slower by every passing month, I've never installed anything on my PC except games from Steam and Windows Update stuff and graphics card drivers from the official AMD website. My Intel Pentium Dual Core E218 (2.00 GHz) is now running at 1.40 GHz. I always keep my PC clean and virus free yet for some reason the CPU has slowed down a lot and games that I used to play before are almost unplayable now. A friend suggested that I might have to update my BIOS but he also said that 1 **** up and it could ruin my PC forever, and I've got just as much PC experience as a turtle has speed. I recently upgraded to Windows 7 64-bit from Windows XP 32-bit but my CPU still remains at 1.40 GHz, I've never overclocked or fidgeted with anything on my PC I sometimes carefully hoover out the dust on my CPU but I already had this problem a while before I hoovered my CPU. When I'm on my desktop my CPU temperature is always at around 29 ºC in-game it's around 32 ºC so it's not overheating. I hope you can help. -Love, Panda.