BSOD

Well its been awhile since I tried zonealarm.......and havent since. But anyway been having BSOD since I installed new Buffalo Select PC3200 1GB sticks of ram. I even did memory tests telling me the ram is probably bad.
Kept getting IRQ not equal or less messages and others. Well after making some changes in the BIOS I was unable to start computer so had to reset and clear the bios. Well I tell you I have not had the Stop code errors since. So I am therefore thinking that when i added the ram I probably should have reset the bios then...........
I have changed and added ram numerous times in my life and not had to do that before. I have a PT800CE-A mobo.......
So maybe all the problems i was having before was due to that. Also I have made a swap drive partition for the paging file and that seems better also.