Hi,
Thank you for posting your concern. WindowsApps folder is a protected folder on the system. We do not recommend to remove it since it will affect the applications installed on your computer. If you want to free up some space, you can head over to this link for more instructions. You can also perform Disk Cleanup to delete junks on your computer.
If you want to restore the system settings, you can perform a system restore. It will let you get back to the where your computer created a restore point saved on the driver. You can visit this link for more information and the complete instructions. (Choose Restore from a system restore point.)
Let us know how it goes.