My secondary computer would sometimes freeze randomly, no keyboard or mouse response, can't open task manager, completely locked. I'm forced to force it to shut down, when I turn it back on I get a BSOD, then push the reset button and windows says that it wasn't properly turned off giving me the option to start in safe mode, after I get into windows it will run ok for a while, and sometimes it freezes again I restart it and there nothing on the screen, it turns black, I have to disconnect the power wait a few minutes and turn on again. At other points it gets into windows and my motherboard starts beeping constantly until I shut it off. At other points my computer just restarts randomly. Computer parts are mostly 2 months old, self built (CPU and PSU are 8 months old, I was using them with no issues in my main computer before I upgraded it). Cleaned heatsink and fan NO DUST clogging, I monitor the temperatures on bios and using asus probe ii and hwmonitor, no overheating issues CPU temp: 27C / MOBO temp: 24C, under load max CPU temp: 45C / Mobo temp: 30C What I have done so far: -Event viewer showed problems with the wireless adapter drivers, uninstalled them, no longer using it and the problems persists. -I have tested the ram with memtest86 it passed the test. Ran it for 7 passes for both sticks, then ran it for 4 passes for each stick individually no problem. It just froze once during the test though saying "unexpected interrupt halting cpu0", I used the test many times before and after it only froze once. -I have installed new nvidia drivers. -I have checked the HDD for errors by going to the C: drive right clicking it selecting properties, tools and and check now under the error checking section. -Disabled auto reboot for error, but computer sometimes reboots on its own with no BSOD showing. My specs: OS: Windows XP Professional (SP3) Motherboard: ASUS M4N68T-M (with nvidia Geforce 7025/nForce 630a integrated video) RAM: CORSAIR TW3X2G1333C9A XMS3 2 GB DDR3 CPU: AMD Athlon II X3 425 HDD: Samsung 500 GB SATA II HD502HJ PSU: XION Xon 500 W What could the cause of this problem be? I'll upload the minidump files when I have access to that computer.