I am running XP w/ sp2 with some development tools installed. For some reason I can't determine, all entries in the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall were erased after installing an update in the machine, causing the Change/Remove buttons not to display in the ARP console. My guess is it was a service pack update since checking at the date it was installed, everything I installed afterwards have the Change/Remove button and are existing in the Uninstall registry folder. The list now shows a mix of programs w/ and w/o the Change/Remove buttons. Is there some way or tool to rebuild the registry uninstall information, or any process besides reinstallation of the programs.