I have a Sony Viao laptop running Windows 7. I upgraded the RAM from 1GB to 2 GB. Now the computer will not boot properly. When I press the power button the VIAO screen shows up and then the select boot mode screen flashes up momentarily and it then returns to the VIAO screen. If I hit F8 repeatedly the boot mode menu stays on screen and I can choose "start normally" and everything is fine. Safe mode works fine too, but I shouldn't have to do this, should I? Any suggestions as to how I can get it to boot normally on its own would be much appreciated. Incidentally, putting the old 1GB ram stick back in does not help.