I have a PC running windows 7 64-bit and I am finding it impossible to get windows 7 Service Pack 1 (SP1) to install. I start the installation and it seems to run for more than an hour and appears to be installing OK; but when I restart the PC I get an error saying that the installation was not successful and it the rolls back to where it was before I started the installation. I have tried to install a numbr of times, but without success.
I have also tried:
* Stopping all non-essential start-up items by disabling them booting on startup using msconfig.
* Stopped all firewall and anti-virus from running during installation
* Run the Windows Update System Readiness Tool (kb947821) before the installation
* Run the Windows Update troubleshooter
* Running the installer from within Windows Update, as a standalone x-64 bit installed downloaded from Microsoft, and as an iso file burned to a DVD
* Run sfc.exe /scannow which reported no errors.
- but none of these have had any success
Other Windows Updates seem to install OK - it is just the SP1 update that refuses.
[For info: I have another PC that I recently updated (clean install) from XP to Windows 7. I had a similar problem on this PC after I had performed all the other Windows Updates and instaleld my normal suite of programs. SP1 also refused to install. In the end, I reistaleld Win 7 from disc and then immediately installed SP1 before installing any other updates or programs. SP1 installed OK. However I do not want to follow this route on my main PC as it has a load of programs installed which will take a few days to reinstall if I have to start from scratch].
Can anybody advise how I might install Service Pack 1?
Many thanks in advance for your help.