hey everybody, this glitch has been occuring for a while, but I think I have finally traced it back to CCleaner. after i run CCleaner, whenever i try to watch a youtube video, theres just a black box, and when i right click on it, it says movie not loaded. so for some reason, i think ccleaner disables Flash. in addition, i can't download anything from internet explorer. (PS, these problems only happen with internet explorer) chrome loads videos and downloads file fine. the only way to fix it is restarting the computer.
First a little explaining. This isn't actually the fault of CCLeaner, but yes it is your CCleaner doing it. It's a cache corruption issue, I get it with my internet cache cleaner of choice as well. I was having this issue, then it fixed itself, then, with this last batch of Microsoft updates it began again.
OK now here's the easy fix that I have recently discovered, instead of restarting the machine (which clears the index.dat and thus fixes the issue) open internet explorer, and delete the cache (only the cache, not the history nor cookies, nor autoform information; you can delete them but it's not needed). If you have ie8 make sure that it is NOT set to keep favorites information.