Ok, I downloaded vista on to my laptop at work, brought it home and copied the files to my comp at home. I have an MSDN account at work so I download thed Windows Vista Beta 2 x86 (Checked Build). I have 2 HDD's however only one was plugged in at the time. I know my computer is compatible and I ran the check, but here's some specs anyway: Intel P4 HT 3.4 GHZ 32-bit proccessor MSI motherboard (not sure about the model number) 800mhz FSB 512MB DDR SDRAM 80GB Samsung HDD (IDE) 40GB Western Digital (IDE) ATI Radeon Graphics card (I forgot the model number) (That should be all the info you need) Anyway I ran the setup from the ISO image using ISObuster (extracted the files to C:\WinVista). I chose the upgrade. Ran the setup, it rebooted once or twice, then on the last time when it loaded up it gave me an error. (Application Error: Could not access 0x****** at blah blah... 0x*******) I don't remember the numbers and I will have to see when I get home. When I do, I'll be sure to edit my post. Anyway it says change made to computer will be removed, restarts, and boots Vista setup again??!! Going straight to the same error again. Now I could not boot off of that Hard disk anymore. So I plugged in my other one (which has another copy of WinXP). I set the one I plugged in to master, and the one I tried installing Vista on to slave. I went in to my F:\ drive (the one of the attempted vista installation) and copied all the important files to my working C:\ drive. I then formatted the F:\ drive (NTFS). (I don't remember If i ever created a partition on it...hehe) At this time, It had been a day, and while I was working during that next day, I burned two DVD's. I have nero, and it lets you choose a data disk or bootable data disk for data dvd's. I choose the standard boot image option. I just put the CD in while windows running. I intiated the setup and choose a clean install to F:\ It went through the procedure, and eventually got to the same thing. Restarted and it pulled the error. I never checked the first time, So I"m not sure if it's EXACTLY the same. But it most likely is. So now for some reason I can't even boot off the HDD that I was using, the one the I never attempted to install Vista on. So I disconnected and swtiched the Hard Drives, and set the one that I've been trying to install vista on to Master (the 80 gig HDD) and the other to slave. I put in my Windows Xp CD and booted from the disk. Deleted the existing partition, and formatted the drive using NTFS (quick). I have now installed Windows XP on that drive. I just checked and saw another released, that was released today. I'm downloading it now, I won't have it on a disk, but I can transfer it to either one of the harddrives. What should I do now, should I just try installing on a different Hard Drive, as I have had problems with Windows on that HDD before. (Boot Failures, Data corruptions, etc). Should I just create 2 partitions, reinstall winxp on one, and try installing vista on the other partition from XP? I need some opinions or help on this? I'm not an id***, but I don't really have much experience with these kinds of problems, so I am at a loss of what to do..... waiting for help... Thank you