Error 5105 in iTunes

I have tried nearly every method to fix the Error 5105 when downloading apps but it has not resolved the problem.

Any help would be appreciated.

Running iTunes as administrator - Did not work.

Disabling Bonjour service - Did not work.

Cleaning registry - Did not work.

Reinstalling iTunes - Did not work.

Running Windows 7 (64-bit)

There are thousands of people out there with the same problem and Apple don't seem to want to address it...

The most strange thing is when I restart my computer and run iTunes on occasion I can download one app but then the same problem will reoccur when I try to download another.

Anyone else having the same problem as me?