Q: Error while trying to access itunes

Oh jeeze, looks like some kind of random Windows errror which may not be so easy to beat.

Try updating your iTunes for now...

Ok, time to check with iTS.

iTunes Store Support

http://www.apple.com/emea/support/itunes/contact.html

That won't help.

Start off with...

http://support.apple.com/kb/TS1368

If you're still unsuccessful ...

http://support.apple.com/kb/TS3297

And maybe...

http://support.apple.com/kb/TS3222

The point is, any AppleCare Advisor is going to tell you that it's a Windows problem (which it is).  The best that Apple can do is create a case that their engineers can look at. That would be the only reason to contact AppleCare, and they can't fix it (literally, can't).

By the way: I have yet to find a surefire solution to this that doesn't involve completely reinstalling Windows (as this appears to be a certificate error having to do with Windows Firewall (which can't be circumvented for some reason)).