Re: hard disk space?
What does Disk Management say about the disk - is it showing as the correct size there, or extended beyond it's "max space"?
Try running DIsk Cleanup and when it's finished it's first scan, click the "Scan system files" option as well, and re-scan.
I'd also try dropping down your System Restore allocation percentage (System -> Advanced System Settings -> System Protection tab)
Also under Advanced System Settings, under the advanced Tab->Performance Settings, check what your Page FIle / Virtual Memory is set to.
Laptop: MSI GT70 2OC-059us | i7-4700MQ | 16GB | GTX 770m | 500GB SSD / 750GB HDD | 17.3" | Win10 Pro
Desktop: 4690k | 12GB g.Skill RipJaws | GTX 970 | 520hx | Z87X-UD4H | Corsair Vengeance C70 | Corsair H110 | Acer 25" | Acer 22" | Win10
Mobile: Samsung Galaxy Note 5
If I help you, or you just like what I said, rep me by clicking the under my post