Can't upgrade windows 8 to Windows 8.1

[Jaguarek62]

I'm trying to help my friend with his old hp desktop pc, but I can't seem to upgrade his os to 8.1. I'm using official microsoft ISO. Anyone could help?

 

http://prnt.sc/1r8s7wk -- rough translation

Windows 8.1 could not be installed. Computer has been restored to previous state as it was before windows 8.1 install

Edited September 4, 2021 by Jaguarek62

[dencorso]

Becoming forgetful, are you? Remember this? 

[Jaguarek62]

5 minutes ago, dencorso said:

Becoming forgetful, are you? Remember this? 

Uhm, i5-4590 is definitely 8.1 compatible though.

[dencorso]

On 9/4/2021 at 6:36 PM, Jaguarek62 said:

his old hp desktop pc

Just now, Jaguarek62 said:

i5-4590 is definitely 8.1 compatible though.

Yeah, sure! That's the issue with being vague. The machine I'm writing from is a i7-3770K, which is older and perfectly capable of running 8.1 x64, too.
But when you speak of "old", I, for one, think of way older machines. Anything able to run 10 x64 or debian buster x64 doesn't quite fit "old desktop" in my perverted mind, at least. Sorry I misunderstood you!