Alright, I'm packaging an app for work and finally got every function working properly after countless hours of troubleshooting. Then I tested out the uninstall. After I install the app, everything works great, I can install/uninstall other apps no problem. But if I uninstall the original app, then I cannot install anything else unless I reboot which is unacceptable. The original setup does not require a reboot after uninstall. If I do try to install another app without a reboot then I get the error "Windows installer service could not be accessed...." If I try to manually start the windows installer service the I get the error message: "Could not start the Windows installer service on the local computer. Error 1018: Illegal operation detected on a registry key that has been marked for deletion." I have google this to no end, tried to use procmon, and have the uninstall log if anyone wants me to post it. I'm fairly new to packaging apps and am pleading for some of you experts to help me figure this out. Thanks in advance.