There is a program called "Trojan Remover"

Download Trojan Remover 6.6.1 Build 2483 [UPDATE] Free Trial - Trojan Remover - aids in the removal of Trojan Horses from a computer - Softpedia

I ran this while the problem was happening, it was tricky but I got it to install (had to move the fingers quickly b/c you know how it restarts the explorer screen every 5 seconds...but once it installed and scanned it errored out and I restarted the program ran it again and it stopped the loop and removed the trojan that causes it.

Good luck!
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