What I would suggest now is that you run a cleanup and then defrag/optimise the drives
Clear Restore Points
In the search box type cleanmgr.exe
Right click cleanmgr.exe and select run as administrator
When it pops up at the first prompt select OK after it has done some calculations the tabs will appear
Select More Options tab
Press System Restore and Shadow Copies Cleanup button
THEN
http://helpdeskgeek.com/windows-8/what-happened-to-disk-defragmenter-in-windows-8/ Optimise the drive