Q: iTunes11 - entry poiont not found

I have fownloaded iTunesSetup (1).exe twice and installed many times and keep getting

iTunes.exe - entry poiont not found

The procedure entry point ADAsServer_Set{ropertiesForAdRequest could not be located in the DLL AdCore,dll

OS: Windows 7

,NET:     4.51

Is there a fix for this errot?

Regards

Jim