I have the identical problem with IE10 and IE11. I'm glad to hear I'm not the only one having the problem. Oddly enough, I also have a 32-bit Windows computer running IE11. PCPitstop works on that one just fine.
I am able to uninstall, but I am not able to install.
Everything seems to be fine. Then I get a message telling me the installation did not complete.
I am doing a system restore to get IE 11 back.
I can live without running PC Pitstop.
I must be running the 32-bit version because I do right-click and run as administrator.
I only use IE for PC Pitstop, so I'm not sure how to set IE back to defaults.
-Bob
Windows 7 Home Premium and up-to-date IE 11. I get the Overdrive window but nothing ever shows up. I find out about IE not being recognized via troubleshooting. I always run IE in Administrative mode.
-Bob