@Justedlev
I reviewed your post and I understand that you are facing issues installing HP support assistant on your computer.
Don’t worry, I assure you I will try my best to get this sorted.
Are you using an administrator account?
Meanwhile, I recommend you download and install the HP support assistant app from the below link and check if it helps.
http://www8.hp.com/in/en/campaigns/hpsupportassistant/hpsupport.html?jumpid=va_r602_in/en/any/psg/pl...
Let me know how it goes and you have a great day!
P.S: Welcome to the HP Support Community 😊
If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!
Cheers!
Stay Home – Stay Safe
The_Fossette
I am an HP Employee