Hi there and welcome myself to the forums!
I write this thread because on a fresh installation of Windows 7 Ultimate x64, after some time (1 day or so of using it), an action that requires user elevation (thus showing the UAC prompt), when run doesn't show such prompt and apparently it's hidden somewhere because that "object" where I clicked because unclickeable from now on and gives the "ding ding ding" typical Windows sound everytime you click there. Let me explain with and example:
I click the start menu, launch a program that requires elevation, BAM, nothing happens: the screen doesn't dim, no popup comes around, and the application didn't lunch. Now, when trying to click the start menu again, it's blocked, as in that it doesn't respond and the sound comes everytime you click it. It's like if the elevation prompt was displayed, but it's nowhere to be found. Instead, what I have to do is restart the computer (usually the only way I've found is WIN+R, cmd, shutdown /r, because nothing else responds).
The action that produces this could be anything that requires the elevation prompt: running said app, copying a file to a protected folder, etc. It happens "after a while" of using the computer, and all previous prompts display fine.
UAC is set to the maximum security level (slider up) and this never happened before, even when using the same machin on previous installations of the same version of Windows 7.
Obviously I've googled for this and searched in this forum and I couldn't find a single post talking about this...
Anyway, I'd greatly appreciate any help you can give me. Thanks in advance guys