Alright, this problem first started happening maybe a month ago. I started to notice little glitches on the desktop wallpaper. Then maybe a couple weeks ago it got to the point where windows would not even start up. Whenever I had pressed the button on the pc for bootup, it got to the windows loading screen then restarted over and over again. So I reformatted my computer and everything started to work fine. After maybe 2 days I decided I needed more ram for some pc games. Following a suggestion from my brother I took our my original ram (to see which way my new ram would go in) then put it back in with the new ram in the 2nd slot. When I started it up it beeped three times then shutdown. I learned from the CompUSA guy that the ram was not compatible. So taking out the new ram I ran my computer again with my original ram and it would get to the windows loading screen then restart just like last time. I had to reformat my computer AGAIN! Once everything was fine and working, the CompUSA guy decided that I should take in my original ram for them to find a compatible one. After they gave me my new ram, I went home and put them both in. When I tried to start up my computer it went to the windows loading screen then restarted. Frustrated I reformatted my computer a third time! After maybe 2 days of my pc working well with my 2 rams (adds to 768, one 256 and the new 512) my computer started flickering like it did from the beginning of this whole issue. Now whenever I restart, it gets to the windows screen, flickers about 8 times then restarts. Sometimes if I hit ctrl alt delete at the exact moment my desktop comes on, it will flicker a few times then go normal. This is where im at right now...lucky to be on. Please help me.