Itunes 10 on Windows 7 64 bit problems

Hi
I installed Itunes 10 on my new Windows 7 64 bit laptop and since then, I only have problems:

1. Every time I lunch Itunes the message appears: windows is configuring Itunes...wait... then it starts. Don't know what this is but it is definitely annoying.

2. When I want to activate the PC, I receive the following message: Errors occured when saving Identification information. Try to repair Itunes...

I tried to do this but with no success!

Would appreciate if you could help me as I have several purchased records which I can only play if I can connect to my Itunes account!!!!

Thanks
Thomas