CS2 is not supported on Win 7 and this is one of the reasons why.
Anything can go wrong and it can happen at any time.
A couple weeks ago I contacted support on an activation issue for a CS2 product and they had me uninstall the current CS2 program and then reinstall the program from the website using a new serial # which fixed the activation issue. I was hoping for a similar solution
Did you read the disclaimer on that download page? If not, I recommend
you go back and do so.
Sorry, I wish I had something encouraging for you, but I don't.