Failure to Exit iTunes

I've been trying to purchase a few music tracks - normally a very simple operation. When I try to hear the sample track, all i-tunes seems to do lately is stop/start with Rebuffering Stream delays. I also have persisted in trying to download a purchase I thought had successfully downloaded some weeks previously (I omitted to check the purchases as I never have a problem - usually)! Finally downloaded it - now to attempt to purchase more.

Time to call in help from Above................

I had the same problem, and it turned out to be my anti-virus software, NOD32. Whatever your anti-virus software, try adding itunes.exe into the exception list, so it does not scan it.

How do you add Itunes to the exeception list on Nod32???

Click on AMON
Then click Setup
Click the Exclusions tab
Click Add
Find your iTunes folder (should be something like C:\Users\(your user name)\Music\iTunes)
btw, make sure it includes all of the subfolders too
Then your done!