1. The Windows 10 system was upgraded on 2018/06/26, and the previous version of Windows was backed up in the Windows.old directory, as shown in Figure 1.
2. Check the C drive space; 36.0 GB is available, as shown in Figure 2.
3. Check the URL: https://support.microsoft.com/zh-cn/help/4028075/windows-delete-your-previous-version-of-windows . Ten days after upgrading to Windows 10, the previous version of Windows will be automatically deleted from the computer. However, I need to free up C drive space immediately.
4. In the search box on the taskbar, type “Settings”, and then select it from the list of results, as shown in Figure 3.
5. Select “System” > “Storage” > “Free up space now”, as shown in Figure 4.
6. Under “Delete temporary files”, select the “Windows upgrade log files” and “Previous Windows installation(s)” checkboxes, and then click “Remove files”, as shown in Figure 5.
7. Deleting temporary files is complete. The sizes of “Windows upgrade log files” and “Previous Windows installation(s)” are 0 bytes, as shown in Figure 6.
8. Check the C drive space; 50.3 GB is available, freeing up 14.3 GB of space, as shown in Figure 7.
