Logging into windows 7 ultimate x64 now takes about 20 minutes.

Here it is. I have a lot of games.

It sounds like it could be hard drive related, aside from the amount of free space, have you checked the hard drive for errors (chkdsk) or run any manufacturer tools on it? If the drive light goes off during the login process, that can often result from network issues. Try disabling any network connections and rebooting.

As for registry cleaners, let's do some house-cleaning. Some are bad and should be avoided. CCleaner is not one of them, and is very safe...and highly recommended. It's default registry cleaner doesn't dig deep enough to mess up the system. That doesn't mean you should use it blindly...but there is very little to worry about, in terms of using it.

sorry for the delay

Do you have any ideas which don't involve me deleting games?

I'm going to guess that this is a laptop, so adding a second hard drive isn't an option. If so, than no, there's no better idea for the time being. The rule of thumb used to be 30%....meaning to keep a drive running efficiently, you needed at least 30% free. Take that as you wish, but if this is a laptop, then it wasn't designed to be a gaming system, and you should probably look into removing some games.

That being said, is this an SSD? If not, check to see if you have other partitions on the drive through Disk Management. There may be a large restore partition that can be reclaimed (assuming you can make restore discs).

If the network test doesn't yield any results, you'll pretty much be left to get a bigger drive or remove some games.

Okay, I'm going to reboot, also, I found other stuff and now it's 4.39GB free.