Windows Setup experienced an unexpected error. To install Windows, restart the installation
N.B.; Problem solved.
Thanks to the miracle of MSDN subscriptions, I’m privileged to be in the possession of a (legally licensed and perfectly legitimate) copy of the brand new release of Windows 7 …. not the RC, mind, the RTM made available so that manufacturers and the like can prepare computer for release on the 22nd and the like.
Seeing as I’ve spent a great deal of time getting my Windows Vista Ultimate machine tuned to perfection, I really wasn’t looking forward to starting from scratch, so I decided to try my luck with an upgrade…. The ISO was downloaded and burned to disk, and I was ready to go. With Windows Vista running, I inserted the DVD and began the upgrade process, only to come across…
Windows Setup experienced an unexpected error. To install Windows, restart the installation (…. along with the error code 0×0.)
Rummaging the web for advice proved quite fruitless, as the OS is brand new, and most of the comments in the Google search results related to Windows XP -> Vista upgrades.
To cut a long story short, I’ve discovered that the problem was two-fold … firstly, the presence fo a running copy of AVG managed to bring the process to a halt, though I suspect that this would have been the case had I any other third party AV running. So, using the process manager, I carefully bought all AV related process to a halt. Then I had to deal with the second issue, which was the fact that the install simply did not want to work from a DVD. The ISO itself was intact, and the disk was burned on quality media at a reasonable speed with reliable hardware and software.
The solution: Mount the ISO as a virtual drive using ISOmagic. The installation began without a hitch, and concluded seamlessly.
As a side note, here are some other things that I tried as a result of rooting about for solutions in forums, none of which made any difference.
** Turning off the DMA feature for the IDE channel of the drive you wish to install the OS on
** Burning the disk at stupidly slow speeds (this irks me – modern drives burn perfectly well at good speeds if you have half-decent media)
** Changing the order of the drives as they are physically connected to the motherboad (sigh)
I’m happy to answer any questions with regards to the install, should you have any… feel free to leave comments attached to this post.
Happy days….
ADDITIONAL; August 20. Those people not wishing to perform an upgrade might try re-downloading the ISO, running am MD5/CRC check, and burning the ISO to different brand media. Despite what you read elsewhere, my experience leads me to believe that burn speed is pretty much NEVER the root of issues … not with a quality optical drive and decemt media, anyway.
Tags:fixed, install, problem, resolved, solution, ultimate, windows 7

August 21st, 2009 at 5:04 pm -
Hi the same is happening to me with server 2008 r2 from RC to RTM I’ve tried using the virtual drive but sometimes says the installation need the media (weird) and when its almost at the end of migration of application a horrible bsod appears :S you know any clue about what’s happening? thanks
August 21st, 2009 at 5:16 pm -
Hi Keoz,
Wow, the possibilities as to what’s causing your issue are endless! Here’s a string of thoughts, I hope they help…
Is your hardware appropriate/compatable? Can you get a fresh copy of the ISO and run an MD5/CRC check on it? Try another app to mount the ISO (this can make a huge difference)? Is the RC -> RTM upgrade allowed?
Please let me know what you try, and if you have any success – best of luck!
August 21st, 2009 at 7:07 pm -
….also, is there any chance of you posting a copy of the info on your BSOD?
October 3rd, 2009 at 10:03 pm -
Very interesting article, although I have disabled all AV, mounted as a virtual ISO and it still fails right at the start
October 4th, 2009 at 3:11 pm -
Liam, if you can describe your failure in detail, I’ll put some thought to it if you’d like. It’s always easier helping with other peoples issues rather than your own, huh
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Hello from Russia!
Can I quote a post in your blog with the link to you?
October 22nd, 2009 at 4:23 pm -
Sure, feel free
December 25th, 2009 at 2:13 am -
Hey Man – You just rock!!..I was in a fix about getting this error while upgrading xp to win7, wasted few dvds to make it work but it didn’t. But after reading you blog, I just mounted the iso file and it worked in very first attempt. Thanks a lot, hats off to you!!!
December 25th, 2009 at 10:09 pm -
Glad things worked out for you
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Sure, I can help you with that issue…..
You will need to edit the registry to do this… if you are not confident working with the registry, get someone else with a better set of IT skills to help you with this. WARNING – making POOR changes to your registry may cause your computer to misbehave OR stop operating. I take no responsibility for any cock-ups you might make
Click on your start button type REGEDIT then press enter
In REGEDIT open the HKEY_LOCAL_MACHINE branch
open the SOFTWARE branch
open the Microsoft branch
open the Windows branch
open the CurrentVersion branch
open the Policiesbranch
Left click ONCE on “System”
In the right hand pane, double click on the entry “Dontdisplaylastusername”
Change it’s value to 0 and make sure that it’s set to be a hexadecimal value.
Click OK, close REGEDIT and restart your computer.
Let me know how you get on.
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