You can try to do these things
- Try to move the osu! folder to another location.
- Disable all background programs that scan, antivirus, programs that upload like mega, dropbox, google drive etc.
- Run windows in safe mode and try to run osu!
If the last step worked, try closing each background program to isolate which program is accessing the osu! folder.
If that doesn't work, try creating a new user and running osu! there with administrator.
If that still doesn't work, trying to fix folder permissions might work
You can also manually set the permissions yourself but it's gonna take some steps
- Navigate through the root folder of osu! and open up the properties
- Select then Alt + Enter or
- Right click > Properties
- Go to Security tab and click on Advanced
- Go to Owner tab and click on "Edit..."
- Choose your account and click on "Replace owner on..."
- Click on OK and wait for it to apply.
After that
- Navigate through the root folder of osu! again and open up the properties
- Select then Alt + Enter or
- Right click > Properties
- Go to Security tab and click on Advanced
- Go to Permissions tab then "Change Permissions..."
- Click on "Add..." and enter your Username there
- Click on OK and select on Allow all (at the top)
- Click on OK and wait for it to apply.
