I seem to be having a very strange problem. When I start Outlook 2007, it stalls and then deletes the Outlook.exe file. This is a relatively new problem (within the last week). All other files seem to be present. If I keep a full copy of Outlook.ext in another folder, that is also deleted. In some cases, after restoring the file, Outlook will start to come up but then stall and die. In other cases, it won't won't even start to come up but just deletes itself.

I've run several different types of anti-virus software including AVG, Avira, Spybot and none seem to find an issue or help. I've also run Avast and that doesn't help, although Avast is creating it's own problems. I've tried uninstalling Avast and it won't uninstall. It seems to be locked in the registry and I can't remove it from there as I get a message Access denied. I'm wondering if this is somehow affecting the Outlook. Any help is greatly appreciated.