No matter what I do _ uninstall, reinstall, etc. Quicktime tells me I need Apple Application Support. I then tried to put on iTunes. Says the program doesn't have sufficient permissions (I ran the thing as admin with full control permissions) to install. I tried the running through winrar trick mentioned on the apple support page. Still nothing. When I run itunes, it comes up, says run, then vanishes and never actually installs. SInce many videos seem to run only on quicktime, I am at a loss as to how to proceed. Thank you for any help.