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