I have the same probleme at my work with 3 other co-worker. While my boss was able to download and install it.
Windows 8.1 does not appear in Windows 8 Professional [NOT 8.1 Preview] Store
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THIS THREAD IS
NOT
AT ALL
IN ANY WAY
ABOUT WINDOWS 8 PREVIEW ISSUES
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Windows 8 Professional (NOT PREVIEW) does not show the Windows 8.1 Update on the Store. Instead the Store, as usual, begins with Spotlight and not Windows.
These additional (perhaps related) issues are present:
- Unable to install KB2871389
- Facebook App in the store cannot be installed as the system does not meet minimum requirements
The following have been tried:
- Updating from Preview - BECAUSE WE ARE NOT RUNNING PREVIEW
- Numerous direct links to the entry on the store (paste ms-windows-store:WindowsUpgrade into IE, Chrome, FFx)
- SFC /SCANNOW
- WSRESET
- Checked not running Windows 8 Enterprise, Windows 8 Pro via KMS activation, and Windows 8 via MSDN ISO's.
- Waited for a period of time with the PC turned on
- Sitting for an hour with MS Support (thanks Jer419!)
- Clean install of latest nVidia display drivers using GeForce Experience
- Windows Update Troubleshooter
- Uninstall, reboot, and re-install of nVidia Drivers
- Clean boot and installation of US Language Pack (couldn't do it)
- System refresh followed by Windows Update Repairs
- Windows 8.1 Upgrade Assistant
- Installation of KB2871389 which is an update to Windows 8 to make the store ready for 8.1 downloads(previously "The update is not applicable to your computer") - now just fails after the system restarts.
- Installing every available update one-by-one
- Another system refresh
Fixes achieved:
- System refresh fixed:
--- Being unable to install the US Language Pack (KB2607607)
--- Windows Update issue where there was a repeating install of one update and no updates listed as having been installed ever (it's still not 100%, however, with updates failing on reboot)
--- Program and Features > "Turn Windows Features on and off" previously showed an empty white box with NO "Please Wait..."
CONCLUSION
My problem with failures to install ANY Windows 8 updates that install when the computer reboots seems to have been caused by the Software Protection service failing to start properly.
In the Windows Update issue post, see that my only resolution was to burn a Windows 8 DVD and then do Setup, and to only leave behind my data. This fixed the issue first time. Yes it was hassle, but it took a lot less time to get my computer back up and running and installing updates (which let's face it, is worth about as much as getting 8.1 to show up in the store).
See that post for information on how to check if you have the same problem as me, ie the Software Protection service isn't running and fails to start with an Access Denied error.
Windows for home | Previous Windows versions | Install and upgrade
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106 answers
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Anonymous
2013-10-17T12:54:20+00:00 -
Anonymous
2013-10-17T13:53:04+00:00 Hi,
You might need the latest updates from Windows Update
Nope Windows is fully upto date
You might be running an edition of Windows 8 that doesn’t support the free update from the Store
- Windows 8 Enterprise****
Nope I'm on Pro
- Editions of Windows 8 Pro that are installed by enterprises using KMS activation
Nope it's a retail package (got the box and discs etc not a volume install)
- Editions of Windows 8 that are installed using an MSDN ISO, and activated using multiple activation keys****
nope it came in a box from Amazon
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Anonymous
2013-10-17T13:41:02+00:00 This page may help as well:
http://windows.microsoft.com/en-us/windows-8/why-can-t-find-update-store
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Anonymous
2013-10-17T13:01:48+00:00 How to upgrade from Windows 8 to Windows 8.1 for free <br><br>October 17th, 2013 Note: Before you start the upgrade process, run Windows Update to insure all the latest updates have been installed. 1) From the Start screen click on the Microsoft Store tile. 
<br> --- <br> --- 2) Click on the "Update to Windows 8.1 for free" option. 
<br> --- <br> --- 3) Click on the 'Download' button. 
<br> --- <br> --- 4) The download and upgrade process will start. 
<br> --- <br> --- 5) Click on the "accept the Windows Software License Terms" when prompted. -
Anonymous
2013-10-17T12:58:19+00:00 My PC does not show the Windows 8.1 Update on the Store.
Mine was like that for a few minutes this morning after I first booted into Win8. Store only showed the regular apps selections at first but after I'd been online for an hour or so doing other things I went back into Store and the Win8.1 upgrade had appeared.