I'd had the same problem for a few weeks. I realize this is an old thread, but as this is the first link Goog displays when searching, thought I'd post what fixed my issue here.
The Background Intelligent Transfer Service
MUST be running for automatic updates to complete.
To check if BITS is running, open your services console:
Run - services.msc
Check status of BITS. If it's not 'started,' right-click and select 'Start.'
If it will not start, step through the instructions on this page:
http://www.botmanfamily.net/~aurelie...einstall.shtml
This will get your BITS service running and finally enable auto-updates.
My issue was fixed after a reboot at step 3. Yours may be fixed sooner or may need to go through all his steps. But regardless, step though those instructions in the order he's posted them. Don't neglect to reboot between changes.
HTH
-Godot
take your fingers out of your noses. your wait is over.