To get a solution to this problem, you can try the this method:
You are ready to start disk cleaning
Backup your files first.
Clear the cache and allow the system to reboot.
Open Windows Explorer and right-click on your system's root directory.
Click Properties, then click Disk Cleanup.
If you can’t resolve this error, you can directly contact Quickbooks Customer Service +1(855) 756-1077. For further information, you can directly visit here at http://errorcustomersupportphonenumber.com/how-to-resolve-quickbooks-error-8007/