I have Parallels Bld 3188 and have installed a fresh copy of XP SP2 and have the ACPI error as well. I installed the tools and the weird thing is now it still has the "install tools" option on the actions menu. Originally I "installed tools" then "prepared for Vista", then I got an error while installing Vista saying I had to have SP2. I installed SP2 then started getting the ACPI problem and the others problems described earlier. BTW I have Vista Ultimate upgrade. I'll check back later and see if there is a fix or some suggestion.
Edit: I figured out my problem. After my first attempt at installing Vista I had prepared for Vista, this set the OS type to Vista. Then I installed SP2 on XP because Vista required it. I was then trying to install Vista which was having the ACPI problem. I switched the OS type manually back to Vista and selected Update for Vista again and it is running. I'm not done with the install yet, but it is installing.
Edit2: That worked, I have it installed and running. There are only two items that are not working.....1) mouse sync 2) video driver. I'll search the forum and see if any of these two have popped up before.
Edit3: Figured out that I need to unistall Parallels tools and re-install in Vista to get the mouse and video to work as before.
Last edited: May 17, 2007