It's simple...
Uninstall your TS2009 directory. You might have to do this with admin rights if prompted. Once you do that, delete any shortcuts and then run CC-Cleaner or something like that to clean up the pieces.
What causes this?
When installing updates or patches in TS2009 and even TS2010, the info file called .uninstall.dat isn't updated to reflect the newer files. This file is used by the uninstall.exe to know which files to delete, but since the file has the wrong files listed, uninstall.exe complains and fails.
N3V isn't the only one who as fallen victim of this. This is caused by the software used to build the install package. In the old days I used to use Vice which was very common and caused this issue all the time.
John