I have been working on a users computer for a about a week now and have read about 100 posts on google. I am having trouble uninstalling Service Pack 2 from her Vista X64 machine. I want uninstall the service pack because it has created havoc for her computer. It constantly keeps rebooting at random times and shows a blue screen beginning to dump physical memory. Then when Windows boots back up it says it has recovered from a serious error. On average the computer reboots at least 4 or 5 times a day. I have tried to remove it from the control panel and it says "uninstall was not completed successfully." Her system restore date does not go back far enough, so I can not restore her PC before the SP2 was installed. Have tried all the steps from the following post: How to uninstall Windows Vista service packs as a troubleshooting step. The command line option just sits there for about 5 minutes and then returns to the C: prompt, it never asks me to reboot the system. Another technician installed the SP and he did not save the restore files. I have tried to download the SP 2 and place the file in C:\temp and uninstall through the command line but this also does not work. I am stuck and need help uninstalling service pack 2. The user also just purchased an HP printer office jet 6500 and have read online that HP printers have not had much success with Vista x64 systems. Any help would be greatly appreciated. If possible, I do not want to reload the PC and I only have remote access to the computer.