TheBigMiike wrote:Have you tried to create a new administrator account in your computer and from this account, to update the game ? Who knows, it could be a solution

Didn't work...

TMarc wrote:Uninstall competely. Download the most actual setup from the https://player.maniaplanet.com page (Accounts -> Downloads) and install it.

Alread tried that three times, deleted all game data from my PC, but it still didn't work. Also tried installing directly on C:\, which didn't work as well.

Still not solved!!

Yep, it's installed in Program Files (x86)\ManiaPlanet

Omnixor wrote:where do you have your game installed?

I think, I installed it in Program Files (x86)...

Didn't work... The same boxes still appear.

I will try that later. Thanks for the answer!

About 65GB... Definitely more than enough.

Yes, it is on the 3rd level in my user control too... And it doesn't make a difference on the fourth level.

Do you mean the user account control in the Windows system control? What do you mean with 3rd or 4th level?