Solving error 0x80070003 in Windows Update / Automatic Updates

I posted a solution to error 0x80070003 on this forum:

Solving error 0x80070003 in WU/AU

Ok, it's in swedish, so here's a translation of the solution steps:

1. Stop the service Automatic Updates
2. Erase everything in the folder C:\WINDOWS\SoftwareDistribution\Download
3. Start the service Automatic Updates
4. Run "wuwuclt /detectnow"
5. Wait for all the updates do download again (important, because otherwise you'll get the same error again)
6. Start the installation of the updates as usual