I'm looking to upgrade 6 apparently identical computers running Windows 7 Home Premium to Windows 7 Professional using Windows Anytime Upgrade.
On 4 of the 6, the upgrade's completed with no issues. However, on the 5th, there's a problem. When I launch the process, it displays an error:
Windows Anytime Upgrade isn't available for online purchase
We're sorry, Windows Anytime Upgrade isn't currently available for online purchase in your country or region. To buy a Windows Anytime Upgrade key and move up to an edition of Windows 7 with more features, visit your local retail store or check back later.
You might need to change locale and language settings to purchase Windows Anytime Upgrade online.
Looking at the log file, it's going to the following URL, which displays the error above:
(I've replaced the actual Windows product key in the URL above).
All of the Regional Settings are set to United Kingdom. I've checked very thoroughly. And the URL above includes "CountryCode=GB", so it looks as if it knows that this is the locale. And the UK is one of the locales in which Windows Anytime Upgrade is supposed to be available.
It's worked on 4 other seemingly identical PCs so far - why not this one?