Dear VukasinJankelic,
I'm glad to see you in Microsoft Community.
Because you have done a lot of operations yourself, including running sfc /scannow and All DISM commands, I don't know what prompts you will get after running this command, but the command to repair the Windows system will not change your activation status.
Since the slui.exe file is a core file related to Windows system activation, and the damage to this file can only be resolved by reinstalling the Windows system.
May I ask Is your Windows system pre-installed by the manufacturer?
If Yes:
Contact your manufacturer to rollback your Windows system to the original version.
If No:
I believe reinstalling and activating your Windows system via the MCT tool can solve your problem.
- Download MCT Tool
- Download ISO
- Go to Download Windows 10 (microsoft.com) and click the "Download Now" button to download MCT (Media Control Tool), then download and run the program
- Select "Create installation media (USB flash drive, DVD or ISO file) for another computer".
- select "Language, version", "Architecture" (if you are not sure about them, select "Use the options recommended for this computer")
- "Select the media you want to use" interface, select "ISO file"
- Then download the Windows ISO file to your disk (about 4-5G in size, it is recommended to choose a non-system disk)
- Select Override system
- After the download is complete, double-click on the ISO file, double-click to run "setup.exe" in the file manager that opens
- Then select "Change the download of updates for Windows Installer"
- "Download updates, drivers and optional functions", select "Keep personal files and applications", accept the terms of the agreement, click "Next" > "Install".
- The system will then reboot a few times before entering the welcome screen.
Disclaimer: Please back up all your important data before executing it.
- Activate the Windows
Click here to view the steps to activate Windows.
If there is anything not clear, please do not hesitate to let me know.
Best regards,
Zoee | Microsoft Community Support Specialist