Vista - Reinstall - Windows Updates - Waiting for 10 Hours

I have had to reinstall my Vista computer.

1. I have done the factory reinstall.

2. I have installed SP1.

3. I have installed SP2.

I have then gone to Windows Updates and and checked for updates.

10 Hours later, I am still waiting for it to check for updates.

There is about 50% CPU activity.

(When I have done a reinstall in the past. After I have finished installing SP2, the updates would usually take about 3 hours.)

There are no errors or anything. It is just taking forever.

Does anyone have any ideas?