I started to get error message at start up after the last itunes update.

ApplePhotoStreams.exe - Entry point not found ...

I searched internet but solutions I tried did not solve the problem

Ran SFC /scannow no problem reported
moved libxml2.dll and SQLite3.dll to mobile device support - same result

Computer is Dell Dimension 9100 with Window 7 Enterprise SP1 with all updates
4 GB Ram, 400 Gb Hard Drive