hitting alt-tab should give you back your desktop icons, or failing that rebooting.
It is a strong possibility that you have a trojan virus that has replaced the legitimate wininet.dll. Do you have up to date anti-virus and anti-spyware programs?
If so run them and see what they find.
If you don't have such programs try avg http://www.grisoft.com/doc/1
there are a number of good freeware anti-spyware programs including adaware, spybot and microsoft anti-spyware.
You might also run a hijackthis log and post it. For information on how to do that go tohttp://www.bleepingcomputer.com/forums/t/34773/preparation-guide-for-use-before-using-malware-removal-tools-and-requesting-help/
After you are sure your computer is clean, here is a site that will provide you with a fresh copy of wininet.dll and instructions on how to install.
Edited by franktiii, 10 December 2005 - 03:06 PM.