Hi there Kimokimo , welcome to PCHF.
This should probebly fix your problem:
1. Click Start, click Run, type regedit, and then click OK.
2. Locate the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\BackupRestore\FilesNotToBackup
3. If the registry subkey exists, go to step 4. If the registry subkey does not exist, create the registry subkey. To do this, follow these steps:
a. Right-click Backup Restore, point to New, and then click Key.
b. Type FilesNotToBackup, and then press ENTER.
4. Quit Registry Editor.
5. Click Start, click Run, type services.msc, and then click OK.
6. Double-click Background Intelligent Transfer Service.
7. In the General tab, click Start.
After that try to update again.