Hi All I got Presario desktop with 200GB HDD (SATA), Athlon 64bit processor and 512mb of RAM. The problem is i am able to boot to the desktop and am able to work on my computer. At times when i get into D Drive to access some pics, the monitor screen goes blank for some 10-15sec and when it comes back i find all the windows which were open to be closed and i just keep looking at the desktop. This happens at times and not always...Can anyone tell me why is this happening, is it because the RAM is faulty or is it something to do with the HDD. I have done a Non Destructiver recovery on my computer as well, but it dosen't help as well. I just have the norton anivirus running on my comp and i don't want to disable it also..please help..... PS: i got SP 2 installed on my pc