Glad to have been of help (eventually), but 22 GB doesn't sound like much free space if you are about to negotiate a Win 10 upgrade. I realize you only had less than 128 GB to begin with, but a C drive that small is really meant for the operating system itself and maybe security software (anti-virus/malware), Everything else really belongs elsewhere, if feasible. Can you not shift some additional programs or files to another drive?
You might want to check for and remove unnecessary Restore Points and run Disk Cleanup to see if either one manages to kick up more space.
