Answeing my own-topic. I found the answer at Microsoft. Maybe help someone else.
Go to Start-Run type msinfo32
A box will come up-click tools-Internet Repair!
In my case a trojan was found by McAfee and now things are ok.
Hey Old, go to control panel...hit internet explorer...hit add/remove....a window will pop-up...3 options, hit repair explorer. should take care of it.