The UAC File Virtualization service failed to start due to the following error:

Event error 7000

The UAC File Virtualization service failed to start due to the following error:
This driver has been blocked from loading
Lance McGrewIT DirectorAsked:
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Lance McGrewIT DirectorAuthor Commented:
I too read the thread at social.technet.microsoft.com however there did not seem to be an answer.  Only that a support ticket with MS was done back in June.
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McKnifeCommented:
But I hope you understood that the authors thought it is a bogus message with no consequences? If UAC is off, this driver is not needed. Is your UAC off?
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Lance McGrewIT DirectorAuthor Commented:
Yes, I understand that was a "theory" with nothing to back it up best I can tell.   My situation runs deeper.  I am experiencing several BSD's during the day and am in the process of trying to eliminate all the obvious event log errors hoping to resolve without a complete burn and install.

And yes, UAC is off

Windows 8.1 Enterprise
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McKnifeCommented:
Well, turn on UAC and see if both the bluescreens and the log error vanishes. I think only the log error will vanish.
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Lance McGrewIT DirectorAuthor Commented:
Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.

C:\>sc config luafv start= auto
[SC] ChangeServiceConfig SUCCESS

C:\>sc start luafv
[SC] StartService FAILED 1275:

This driver has been blocked from loading
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McKnifeCommented:
Ok, yet another way of turning on UAC. And the regular way has the same result, I guess? If yes, I would not hesitate but run an inplace upgrade to repair windows.
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Lance McGrewIT DirectorAuthor Commented:
Does that work with Windows 8.1 x64 Enterprise, doing an inplace upgrade over the existing already upgraded from Windows 8.1 x64 Pro?  I can certainly do an image backup first.   Nothing else to lose.
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McKnifeCommented:
Yes it does, good luck.
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McKnifeCommented:
Did the repair installation help?
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Lance McGrewIT DirectorAuthor Commented:
I cannot find any option to do "inplace upgrade to repair windows" as you suggest.

Only options are:
*Keep Windows settings, personal files, and apps (does not include 3rd party apps)
*Keep personal files only
*Nothing

Booting from DVD you get the regular repair options that will erase 3rd party apps.
Same when launching the DVD with Windows already loaded.  None of the options I see will persevere 3rd party apps.
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McKnifeCommented:
Could it be that you did not use an updated DVD? As an enterprise customer, you may download DVD-ISOs with update 1 already slipstreamed in to the 8.1 DVD.

I am quite sure that's the reason.
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Lance McGrewIT DirectorAuthor Commented:
Sure sounds feasible.  I will have a look to see if I can find update.
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Lance McGrewIT DirectorAuthor Commented:
I already have X19-49847.iso     Just did this upgrade from 8.0 Pro to 8.1 Enterprise within last couple weeks and the update release was back in April.    Any chance Windows 8.1 Enterprise N would be seen as an upgrade?

Version 8.1    Release Date 4/13/2014
Product Description
Windows 8.1 Enterprise includes all the capabilities that customers get with Windows 8.1 Pro, plus premium features designed to provide the mobile productivity, security, manageability, and virtualization needs of today’s Enterprise businesses. This includes Windows 8.1 Update.
System Requirements None Provided.
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McKnifeCommented:
en_windows_8.1_enterprise_with_update_x64_dvd_4065178.iso is the name.
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McKnifeCommented:
Sorry, forget about my last comment, I overlooked that you wrote "This includes Windows 8.1 Update". So it's the right one.

And no, the "N" version will be not help. I don't know why it shouldn't work, wait, I'll try an inplace upgrade on one of mine now.
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McKnifeCommented:
Sorry, this will take a while - I don't have the enterprise 8.1 ISO with update handy and I'll need to download it.
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Lance McGrewIT DirectorAuthor Commented:
McKnife, I will be sincerely appreciative with your willingness to experiment !!!

Regards,
Lance McGrew
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McKnifeCommented:
Ok, done.
My options are
*Keep Windows settings, personal files, and apps
*Keep personal files only
*Nothing

So it works. I am not sure what your problem might be. Let's compare: you downloaded the updated ISO. You have the same OS and updates. Your ISO matches the OS language that you originally installed with? And you mount your ISO within windows - important - and start setup from there?
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Lance McGrewIT DirectorAuthor Commented:
Yes exactly the steps you describe and yes the same exact options, however, this does not keep 3rd party applications installed.  The phrase "Keep Windows settings, personal files, and apps" applies to only the apps already installed from the "Store", not other apps such as my Solidworks, Corel Draw, Adobe Suite, etc.  All those would have to be reinstalled.
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McKnifeCommented:
The additions in the brackets "(does not include 3rd party apps)" are not listed for me. And since I have done it before, I am sure it does what it promises.
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Lance McGrewIT DirectorAuthor Commented:
REFERENCE:
http://technet.microsoft.com/en-us/windows/jj721676.aspx

Are there any prerequisites for Windows 8.1 Update?
Windows 8.1 Update will install only on devices and machines running Windows 8.1. For customers who use Windows Automatic Update (AU) there is a prerequisite Servicing Stack Update (SSU) package ( KB2919442) that will be offered to those devices and operating system instances prior to Windows 8.1 Update being offered. In addition, there is a recommended fix (KB2939087) for those customers who will manually install Windows 8.1 Update.

Can I upgrade Windows 8.0 to Windows 8.1 by applying the Windows 8.1 Update to Windows 8.0?
No. Upgrading Windows 8.0 to Windows 8.1 is a separate operation.
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McKnifeCommented:
Why did you reference that?
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Lance McGrewIT DirectorAuthor Commented:
Thought strange because I upgraded from Windows 8.0 Pro to Windows 8.1 update (Enterprise).   This reads like there is an intermediate step of doing 8.1 first then applying the 8.1 update?   Was not my experience unless doing the 8.0 to 8.1 Update is what started all my mess?
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McKnifeCommented:
I have updated 50 computers from 8 straight to 8.1 with update 1 slipstreamed and kept all the apps. And by the way one of those was the one oI tried the inplace-upgrade on which held the option to keep all applications again.

I am pretty sure that MS meant the following:
You can upgrade win8 with 8.1U1.
You cannot apply U1 to 8 (expecting to get the same end result).
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Lance McGrewIT DirectorAuthor Commented:
Okay -- l have everything I need now.  Points already awarded to you McKnife and closed.

Thanks again for all you help !!
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