GG is known to have problems with quite a few things. Freezing is possible if the driver that it loads does something stupid.
The thing you should do is to send an email to Sega explaining what your issue is and send the .erl files along with it. The email must be in Japanese and you can find the address that you must send it to in
http://pso2.jp/players/news/?id=321&page=2.
There are very few work arounds right now. The usual suspect is your AV, but any driver support application may be the problem. But these are not really a good idea to close down. So the only work around with a high success rate right now is to just use a 32 bit version of Windows.
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