My computer keep locking up. what do i do (update)?

I lately tried another psu and it still kept messing up . My games will close soon after i open them and next i get the total 'sorry but the program needed to be shut down' error, or ill take the bsod. it does this repeatedly. I am running a system i just built so im trying to diminish down what is happening. Iv'e already tested my bump, hd, vid card. Also one thing i.e. weird is that my integrated lan support on my mobo doesnt work. My computer doesnt register it beneath my device manager. I even re-installed window twice. help! hoe do i numeral out what is going on?

Answer:
what version of window are you using?
Before doing anything else you must first run a full system spy ware and anti virus scan if that has not be done already. If you are still running windows ME or Windows 98 consequently keep within mind windows 98 is 10 YEARS OLD! If you are afterwards stop fighting near your computer and install windows xp. You will inevitability at least 256 hit for it to run nicely. As for the MB did you receive a driver disk next to your motherboard? That should have the right drivers

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