Sunday’s Drinking Game – uninstall
Download and install a Windows application. Doesn’t matter which one (optional, do a brief test run).
Uninstall it, reboot, get a bottle of your favourite alcoholic beverage (alcohol percentage of 40% and above, please).
Click on Start> Run> type “regedit”> hit F3 and type the name of the app (or the executable name e.g. My Cool App => mcool.exe), run the search. Take a swig for every registry key not removed.
Go to your Documents and settings, take a swig for every item left there. Start menu items is a bonus swig.
A large gulp if files are left at Program Files.
Try a search throughout the system for anything else related. You’ll be probably on your second bottle, so this is highly up to your taste.