Illustrator CS6 hangs opening existing files

Question

I have been having a problem with Illustrator CS6: Whenever I try to open up an existing file, Illustrator hangs. If I leave it long enough it will open the file. Any click causes a 30 second (at least) delay. I can work in it as long as I'm patient enough to only click once.
System:
OS: Windows 7 Enterprise SP1 - 64bit
Proc: Intel Core i5 CPU M520 @ 2.40 GHz
RAM: 6GB
User is on a domain
Illustrator CS6 64bit has latest update: 16.0.2
Creative Suite Design & Web Premium is installed. No other applications have this problem.
Problem has been occuring for two weeks straight.
Still incurring problem after doing the following:
1) Uninstall full suite and delete preferences; reinstall
2) Uninstall full suite, use cleaner tool, reinstall
3) Install/run FontExplorerX due to missing font
4) Make sure all applications are up-to-date
5) Run Illustrator as administrator and in administrator account (files still did not open properly)
6) Disable smart guides, and select no thumbnail in the layers palatte
Please let me know if you have any suggestions!

Answer 1

"Even still, with my new computer, I can open pdfs, jpgs, pngs, word, excel, etc. pretty much everything except the few I've mentioned..."
And theres your answer. Even with the old computer you are having the same problem with those files. It's not computer specific. The reason why you dont have issues with pdfs, pngs, word, etc is because they do not require you to read/write back to the original drive at all or as often. With adobe native files the computer has to communicate regularly with the original file. In this case the file is miles away. Now while you may have a super fast download and upload speed that does not matter. It comes down to latency or ping (the time it takes for your to read/write the file from the drive to your computer). This latency needs to be really low to not experience any delay. In your case it's not fast enough and it probably won't ever be unless you want to pay to have a dedicated line put into your house from your office.
You may not have noticed before do to the file type used, the size of file, the amount of images linked to the file, or the change in your ISP latency. Latencies have been increased in some areas to allow for higher bandwidths in residential areas as they all share the same hub. The bigger the gaps in latency the more data that could be shared in that space.
If you are unwilling to transfer files back and forth than try using logmein.com with a computer that is in the office. This will give you an idea of how much latency is actually taking place. You will see stops and stutters while your waiting for the screen images to reach your computer at home. I use logmein everyday and I have comptuers at each one of my clients, but I've never been able to work on files directly from my computer at home without transferring them their first. It just isn't applicable due to latency.
My advice would be to look at alternative options at this point. External drives, ftp transfers, remote login to a computer at the location for example.