itunes 11.1.4 doesn't recognize iphone

i am running Windows 8 (ugh) and can't get itunes 11.1.4 to see my iphone 4, IOS 7.0.4. This has just recently started (my last backup thru itunes was 1/9/14.) Also, the pc sees the phone as it appears in the devices & drivers section of my directory. I can move pictures from my iphone, too.

When I plug the usb cord into my computer, i now get a message on my iphone about whether or not to trust this computer. I say yes & then I can see it in the directorys. This is new - it didn't use to do this.

I have repaired itunes from the control panel & have double checked the settings for Apple Mobile Device as per the discussion http://support.apple.com/kb/ts1538

Any suggestions would be appreciated