After installing Win 7 Ultimate on a machine with XP SP3 already installed on another partition I have a weird problem with my XP registry. The following run key for all accounts which are admin members keeps being deleted and recreated on every boot. Any changes will hold only for one reboot. For example if I add a reg string to start a program it will work for the next reboot but when I examine the key it will be missing. Any other changes to the key that I have made like ownership and permissions will also be gone;changed back to their default. I discovered this because certain programs I have installed to run on startup were not starting. This is the only run key effected. Run keys in HKLM are not affected. Even the runonce key works correctly in HKEY_USERS. HKEY_USERS\SID account number(member of admins)\software\microsoft\windows\currentversion\run I tried repairing XP (with XP cd) to no avail.Anyone else had this problem? In the past I had another similar strange effect on a another machine after creating multiboot with xp and server 2003. Some of my graphics card settings stopped working correctly even after driver reinstall and OS repair. My work around is to start everything in HKLM run key. Both the registries in my two other XP SP3 machines work fine. However they are not multiboot.