The windows update in Windows Vista SP2 on my one CPU core Acer takes DAYS !
Allthough it has a broadband connection of 200 Mb/s and a standard LAN networkadapter of 100Mb/s and tens of GB of hard disk space.
Last time (also after days ! haven run continuously) the windows update was finished on 6 Oct 2016.
On 17 Oct 2016, I again launched the Windows Update.
Now, on 19 Oct 2016, the Windows Update is still running.
The SVHOST.EXE process with the WUAUSERV service running in it (a thing you can see by means of the Windows Task Manager via the Process ID or PID of the Process and the Services) has now exactly 29H56m29s and is still using up over 90% of the CPU time.
Changing the priority of the SVHOST.exe from normal to low allows me to have a 'responding' laptop again, but as soon as the system finds the time, it again continues with the Windows Update. This isn't AT ALL a energy saving process !
Sorry for the MicroSoft Engineer, but there is definitely very wrong in the concept of the Windows Update of Windows Vista, and looking at the hundreds of complaints, also of Windows 7.
A fellow ICT engineer.