Please download and install first the BIOS Version 8.7 from http://support.fujitsu-siemens.com/KMT_File.asp?ID=081FC0EE-BA0A-48DE-9CF7-1EB09C24ED99 to get the full support for Single Core CPU with your AMILO La1703 and Windows Vista SP1.
If you have BIOS Version 8.6 or previous versions installed, the Windows Vista SP1 Update will crash.
Additionally it is very important and necessary to download and install second the latest Sounddriver from our website to get a stable system.
http://support.fujitsu-siemens.de/download/Showdescription.asp?SoftwareGUID=02EB4950-1CE2-4D4F-924C-6DAECB829C21