SDUpdate can freeze up if the servers are reacting very slowly. This can happen the day new updates are released (usually on Wednesdays), when too many people try to download them at the same time. But Spybot 2 isn’t really freezed up, it’s just delayed. There are a few solutions for this problem:
1. Wait a minute, it should be active again.
2. You can still use the manual updater.
Download the current file and install it, and you’ll be up-to-date. Here is the direct-update-link where you can reach the latest update everytime.
Please use the Spybot 2 program folder as Destination Folder to store the update, by default:
Windows XP: C:\Program Files\Spybot – Search & Destroy 2
Windows Vista or Windows 7 or Windows 8: C:\Programs (x86)\Spybot – Search & Destroy 2