I\'ve created a custom boot-strapper for my application using Wix and Burn, but in the time it took to learn I managed to install several early variants in such a way that t
Also check HKLM\software\classes\installer\products if your uninstall process is failing even after deleting the keys from Isiah4110's answer. It will resolve this lingering problem:
"SOURCEMGMT: Source is invalid due to missing/inaccessible package"