Cant update to 5.04

[dracco4heads]

So basicly each time i open the launcher it goes, downloading updated tools... at about 30 % it stops, and says: Your game installation is damaged. Please run repair.
When i run repair it claims no errors were found.

I tried clearing my cache, interface, and WTF files

[noteworthynerd]

If nothing else, you can uninstall the game and start from scratch, I know this isn't ideal, but you may have no other choice...

Remember to save your screenshots and addons if there are things you don't want to lose.

[dracco4heads]

Well ofc, but thats kinda the last thing i wanna do since that takes atleast 3-4 hours

Edit!
Running as administrator seems to help, will edit when i get further.