What should I do if the C drive is getting bigger after upgrading Win8.1?

Win8 free update to Win8.1 through the app store, have you found that the C drive has become larger and larger, and the remaining capacity of the C drive has been anxious? In fact, after Win8 upgrade to Win8.1, it will produce a lot of junk files, especially the old system backup file of Windows.old, as many as a few G, it takes up the C drive, Xiaobian suggested that you clean up to release the C drive space. So how do we operate, please take a look at the following steps:
1. First enter the computer (this computer), then use the mouse to click on the system disk (usually C drive), then select “ attribute & rdquo;, as shown below Show:
2, choose us to click "Disk Cleanup", as shown below:
3, then click “ Clean up the system file & rdquo;, as shown below:
4, Finally, check the & ldquo; previous Windows installation & rdquo; file, and then click OK to bottom, clean up after waiting to complete, as shown below:

above operations can be removed to upgrade Win8 Win8 One of the biggest junk files produced after .1, do you understand?