For the past few months I've been having quite a few memory related issues. My specs then where a 3.0ghz Dual core pentium D processor, 1GB RAM, Geforce 7800GTX 512MB video card and a 600 Watt Power supply. Things where good then. After that my dad went and bought 2 gigs of memory, which he couldn't use. I took it off of him and for the remaining 6 months that I left it in my computer I would get the occasional blue screen. (I removed the old RAM). Most often I would get it while watching flash animation like Youtube but at other times it would just happen out of the blue. I ran hardware diagnostics on all my components and everything came up clear. So now, about 3 weeks ago, I replaced the 2Gigs of memory with two 2gig sticks of corsair gaming memory. Of course, after that all the blue screening stopped but now if I have firefox up, a flash program, or simple minimizing, the computer slows down dramastically. If there is audio playing, (like my zune player) it gets really sluggish. I know the memory isn't bad but I can't quite tell what's causing this system slowdown. Also, I'm using 32bit Windows XP, knowing full well that 32 bit only picks up 3 gigs but I'm keeping the extra for when I update. Any suggestions would be greatly appreciated.