Yesterday's update has done some problems for Steam. If any of you can't connect to your Steam Account because it's not logging in, or it gets stuck updating, try this:
- Do a copy of your steamapps folder, located in C:\Program Files\Steam and place it somewhere.
- Erase your Steam client and install it again.
- Replace the new steamapps folder with the old one, and you will get back in with all your games and tools.
This way, it should work.
(I also tried deleting my clientregistry.blob but it didn't work)