Just out of curosity, why are you trying to run IE from the command line?
Beyond that, I would update my virus protection to the latest definition files and run a full system scan.
Following that, Download and install SpyBot - Search and Destroy (v1.3) and see what that finds.
The general rule of thumb is that anything that interferes with normal communication it needs to be nuturalized before it causes more than this minor inconvenience. If this doesn't locate the problem, there are several other ways to search manually, but that is more involved and I don't want to bore you with a long explaination when it is likely not necessary.
Swampster