Here are some options you may consider to clear up disk space – some routine and some extreme:
Run Disk Cleanup tool or CCleaner
Uninstall unused applications
Move Page file to another drive
Use the dedicated dump file option to capture memory dump files on another volume on the system.
Disable system restore points
Offload user profile and program file directories to another volume on the system.
If you don't use hibernate, drop to a command prompt and type powercfg -h off. Do a powercfg /? for a list of options. This will disable hibernation and remove the huge hiberfil.sys file. You can alo change the settings for system restore. I think the default is to use 12% of your drive.