Um. nothing.. frog, maybe.. Anyway...
I may be barking up the wrong tree, but perhaps if you navigate to this key in your registry [go Start, run, type regedit and press OK]:
-then rclick on uninstall in left pane, choose permissions and ensure that the administrator [you, perhaps] at least has Full Control. That should do it.
That fix would apply if most of your add/remove pgms entries were like you describe.... maybe a bit of malware changed it.
Nope. Googling didn help either. All I could find tht could be of any help is to either restore to a previous date [not good, sometimes] or just go down the list of pgms in that key I gave you, click on culprits and then delete any entry which looks like NoModify or NoRemove [or set those values to zero].
Note that some pgms are listed by those long alphanumeric codes...
Tedious. But that's it. Have you Norton AV?