Hi!
What happens when you try to manually upgrade the driver from v3 to v4 because according to this, v4 has been
released.
There is no upgrade choice. v3 is for compatibility with downlevel OS's, Win7 & earlier. v3 and v4 drivers are installed simultaneously when XPS features are selected from Windows 8.1 "Turn Windows features on or off" dialog box. I'm happy to do without XPS features.
If I understand correctly, you wish to upgrade Win8.1 home to Win8.1 pro to enjoy the benefits of it, but receive errors while attempting to do so?
Not quite correct.
Inherited an 8.1 Home system with Korean and English installed.
After a couple years or so of use, I upgraded to Pro.
Reviewing the System & Application logs showed numerous critical errors. Some system behaviors were incorrect, e.g. the Defender Powershell module was missing cmdlets, print settings were not preserved for a Brother MFC.
I followed MS Support KB articles and corrected several problems.
A post in MS forums identified the cause of a critical error, point & print driver installation failure, as an MS update with a quality problem. This is the
prnms003.inf problem. It was a security patch to the XPS subsystem, and was broken in the initial release, KB3000850, leaving behind the driver installation failure.
Since I was removing updates according to published MS support articles to correct problems, and some of the update KB articles contained warnings about adding or removing languages, I figured it best to remove unneeded languages and input methods, back out all possible Windows updates, and repatch off a stable base.
KB2919355, titled Windows 8.1 Update, (note capital U) is what should be that stable base. It is a prerequisite for all further updates. In the past, we would have called it a Service Pack.
I accept the criticism for backing out so many updates. That decision was motivated by the language pack cautions.
I hope this clarifies the history.
