Go to Help>About and see what version you really have. I thought I was having a problem and it wasn’t. Update should be from Admin. account or Run as Admin.
got another laptop here (on W7/64 too) that got firefox updated automatically to 3.69 without any problem ??? but okay, if 3.6.10 is there now ;D
edit: but now that I’m thinking about it, this laptop with FF 3.69 was left idle with FF opened for a while earlier today, and I found it on a constant 100% CPU load…from Firefox, so may be time to upgrade again yes