An Update to SP1 failed. The System is running now in its old state and working fine.
The problem now is, that I can't update to SP1. The SP1 Installer detects the failed patch installation, and tries to continue the installation. It fails, searching for a file that doesn't exist, in the windows temp folder.
Is there a way to tell the SP1 installer to ignore the failed installation, and behave as if it's the first time it tries to install the update?