Latest version of iTunes locks up solid and won't quit, nor can I shut it down via Task Manager or kill the process. It also seems to affect Windows itself, which won't shut down and restart properly when iTunes is sulking in the background.
Nor will the uninstaller run. I have done a repair install on top of it which hasn't solved the problems; and I can't uninstall it in safe mode, either: I get an error message saying something about Windows Installer being messed up, which indeed it seems generally to be at the moment. No crud on my machine and I am now seriously contemplating a reinstall of the whole OS as something has clearly gone quite wrong somewhere. In short, iTunes is behaving like some particularly recalcitrant piece of malware.
Her daughters boyfriend had installed it on the desktop, but since installing, the pc had been really slow, and showing symptoms like yours. When I got there there were 3 task managers opened, and none would do anything, and nothing would shut down. I did a forced shutdown, and uninstalled via its own uninstaller, all has been ok since, and the pc is back to its normal self.
I don't understand why its own uninstaller doesn't work.
Ok then its possibly quicktime related ensure you have quicktime installed and working if no try to uninstall that .I fyouhave probs uninstalling that then install on top of that I had to do all this at the W/end and it worked .