On Win7 I just discovered more TEMP files located under:
%LocalAppData%\Microsoft\Windows\Temporary Internet Files
I just added another line to DelTempFilex.cmd to clear that location as well.
But nothing gets deleted. The error message is stating that files are locked by another process. But you can manually remove all these thousands of cookies, and images, and various other objects. That is where IE keeps track of all your movements in cyber space.
Also, did you notice that new bbPress (as WP plugin) allows more flexibility with post formatting? Hey! Good move Admin!
[Added 4 minutes later] Unfortunately, high formatting doesn’t work. When you try to post a topic with tables and formatting, system automatically strips the HTML tags that not allowed for your user level. That is a pity, but things are more secure that way.