③ Click the check-box in front of the files that you want to clean up and click OK. ① Press Windows and R key on keyboard, type cleanmgr, and then click OK. How to fix C drive out of space in Windows 10/8/7 with Disk Cleanup utility:

To do this, Windows 10/8/7 have built-in Disk Cleanup utility which can delete common types of junk files easily and safely. There are many unnecessary and junk files in C drive, by removing them you can reclaim disk space.

Step 1 - Clean up C drive to reclaim disk space This article introduces a 3-step solution to fix C drive out of space in Windows 10/8/7 laptop/desktop fast and easily. Otherwise, you'll suffer from computer performance down, computer stuck, reboot unexpectedly or even crash. When system C drive is running out of space in Windows 10/8/7, you'd better fix this issue as fast as possible. It is easy to understand, Windows Updates, services, applications, browser cache and many other kinds of files are saved or generated in C drive continuously, sooner or later C drive runs out of space in Windows 10/8/7 computers. When C drive becomes full, it will be shown as red instead of blue in File Explorer. That means, system partition C has higher probability of running out of disk space. However, SSD is still very expensive, so it is much smaller. The read and write speed of SSD is much faster than traditional mechanical disk, so it is good for Operating System and applications. To improve computer performance, many Windows 10 laptop/desktop are equipped with Solid State Drive (SSD). The same with previous versions, system C: drive is running out of space in Windows 10.

Windows 10 reclaim disk space partition