To resolve this issue, follow these steps, time is money, just try it.
1.Click Computer on your desktable and right click Disk C to select Properties.
2.Click Disk Cleanup, you'll see a window just as right, this process need some minutes.
3.Under Disk Cleanup there are Files to delete, tick the files you don't need to free pc space, finally click OK.
This is a very easy operation, first click start button, then click
, at last click Restart.