Perscienter: And I don't care about what some random fanboys try to tell me on an internet forum. The other reports plus my own are enough to assess that it's unstable. If the crowd with an attention span of less than two minutes can't advance beyond Ranzaar and didn't test it, not my problem. I did and it crashes regularly. It's not a special hardware-configuration, plus other 64-bit systems experience similar problems.
I apologise, I thought that you posted here, because you wanted to discuss about this topic. I'm also sorry that I tried to helpful and suggest that the problem may lie elsewhere, because other Win 7 64 bit users don't seen to have the same issues.
PS: And no, I'm not stuck in Ranzaar.
EDIT: I just wanted to add that just yesterday I played over two hours session without experiencing a single crash. If the cause of problems was just the 64 bit operational system, then I would have experienced the issues which you described, but as it turns out it works flawlessly. I don't doubt your statement that it might be unstable in some modern computers, but without knowing more it's hard to say what causes it. If it is OS related then change of Windows settings might help, because it's stable on many 64 bit computers.