Ok I had high hopes for Vista and well its not happening. I tried to install vista at least 5 times. Everytime after the first reboot it installs the update and then goes to completeing installation. Now it just hangs. Either of the times I tried to install it either just stopped completely and locked up or the hdd light stayed on and just did nothing. Please dont tell me to check my memory and hard drives and harware. They are all fine nothing is wrong with them at all. I have had xp installed on there for months now. BTW it is 64 vista ultimate. Retail. I have a total of 8gb or ram that will be in there but I removed 6gb and left 2 because of the supposed install bug. There are no error messages. I also have tried each memory stick.