Issues Syncing w/ iPhone 3G (iTunes 9) - Windows 7 (64-bit) OS

Question

After downloading iTunes 9, I've been having issues syncing my iPhone. I've tried every option available to me and have scoured many a forum to seek some form of solution to this. I've, unfortunately, restored my iPhone and managed to lose all of my data and contact information. This isn't really wants getting to me. The ability to sync my Music/Photos is.
A list of things I've tried.
* Restoring iPhone to original state.
* Uninstalling/Reinstalling Every apple product ever placed on my PC and deleting all data and registry information associated with Apple.
* Syncing my iPhone with another Laptop/PC (which resulted in my phone not even being recognized).
At this point I can assume that the problem lies in part with iTunes or something I missed and my phone in general. Since it costs an arm and a leg to get support from an 'Apple Expert' or to take it to an Apple store I can't resort to that.
On a good note, I have managed to actually get the phone activated and working again. The only thing I can't do is sync/update.
The error message I'm getting on my Laptop is ... blah blah blah "unable to load dataclass" blah blah one..
Any help would be greatly appreciated.

Answer 1

I've tried both of those previously. Sorry I didn't mention that. I've done so many things it's hard to remember. I'm beginning to think that some of the problem lies within the phone. And since I can't even get the computer to be able to read it properly, I can't restore to factory again.
I had a bit of luck with a friends PC and was able to get it to read it, but not sync. So, I may use his iTunes to restore my phone to a factory default. Then attempt to uninstall/reinstall iTunes on my Laptop again to see if it works.
(Also for the copy/paste files, the latest iTunes from the site remedied the issue where the files were in the wrong location, so that was already completed).
The link to the support page is virtually useless though. I'd done everything that page asked before even seeing it. Thanks for trying though. I'll repost after I restore and then uninstall/reinstall again.