Windows 7: Unk problem with game (any game) performance

I think this issues falls under general mainly because I don't know where else to put it. If it should be moved, please let me know and I will.

For the last few months I have been unable to play any games on my pc. we got this pc about 3 years ago. I have some games that I put on it and they worked great. I could play for hours with no issues. over the last few months now, I am unable to play these games. The game will start and I can get into it but it is like the system is too stressed. The games gets choppy and then freezes.

I do not have a separate graphics card. I can watch movies and do anything else on the pc, it is just when I am trying to play a game.

I have tried many things including turning off everything I can to eliminate stuff running int eh background, turning off most of the stuff like search indexing, defragging, system clean up, I have run various 3rd party checkers (not reg cleaners). Frankly I can't think of what I havn't done yet short of reinstalling windows.

I was going to do a system restore, but my restore points only go back about 30 days. I need at least 6 months.



Does anyone here have any ideas as to what may be going wrong or how I can fix it?

my system info :
OS Name Microsoft Windows 7 Home Premium
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name
System Manufacturer HP-Pavilion
System Model AY748AA-ABA p6320y
System Type x64-based PC
Processor AMD Phenom(tm) II X4 820 Processor, 2800 Mhz, 4 Core(s), 4 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. 5.13, 11/12/2009
SMBIOS Version 2.5
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "6.1.7601.17514"
Time Zone Central Standard Time
Installed Physical Memory (RAM) 8.00 GB
Total Physical Memory 7.75 GB
Available Physical Memory 5.39 GB
Total Virtual Memory 15.5 GB
Available Virtual Memory 13.0 GB
Page File Space 7.75 GB
Page File C:\pagefile.sys