An error has occured while executing this program. Free up harddrive space and try again.

This error keeps showing up as I attempt to launch the client. Problem is that I still have like 300+GB space available in my hard drive, and this message will still show up, no matter how much I tried cleaning up my harddisk, deleting temporarily files to free up spaces for my hard drive. Any help would be much appreciated, thanks.

Also, I'm using Windows 10.

 

From others with this problem it was caused by an antivirus program.
If you can disable/uninstall any antivirus programs that might help.
http://royals.ms/forum/threads/error-free-up-harddrive-space-and-try-again.41445/

 

Alright, that worked. Thanks for the help.