I have 'Call of Duty Demo' and now also 'Microsoft Flight SimulatorX demo' which are apparently with errors and add/Remove cannot uninstall them. Strange that the later,FSX is shown in add/remove as 19.40MB while the whole demo was 636MB. Is there some free software that can clear these faulty demos please ? I tried cCleaner but that also could not do it. Going to the registry gives me the creeps, so that's off.
Both demos were download so I have no disk. I tried to use their own uninstaller, but the result is same as when I use add/remove. They stop half way and the window goes off. I deleted the main downloaded files and cleaned up with Registry Mechanic. Both demos still show in add/remove and on my All Programs list.
Delete from start menu all programs and Run the Registry Editor (REGEDIT.EXE). Open HKEY_LOCAL_MACHINE\ SOFTWARE\ Microsoft\ Windows\ CurrentVersion\ Uninstall, and remove any unwanted keys under "Uninstall."
Note: This setting can also be changed with TweakUI.