After upgrading the official version of win 10 system with 360, the prompt "Insufficient system disk space" pops up, which leads to the failure to upgrade successfully. What happened? This situation is more common in machines with hard disks smaller than 80G. You can use 360 to slim down the system disk, free up more available space on disk C, or redistribute the hard disk. This article tells you the specific solution.

The specific method is as follows:

1. The total capacity of drive C of my computer is 30G, and the available space before slimming is only18.6g. When using "360 Upgrade win 10 Test", I still prompt that the system disk space is not enough to upgrade win 10.

2. The premise of using 360 to slim down the system disk is that 360 security guards must be installed on the computer. If not, you can download one. After opening the Guardian, click "More" in the lower right corner of the main interface.

3. Then on the All Tools page, click Add "System Disk Slimming" tool. After loading for a period of time, it will be installed automatically.

4. After the system disk slimming window pops up, he will automatically scan the redundant files and free space in the computer first.

5. Wait until he has finished scanning, and then click the "lose weight now" button.

6. After I lose weight here, I can make 3.7G space on the system disk, and then click to restart the computer immediately.

7.360 system disk slimmed down, and after releasing 3.7G space, I checked the C disk of the computer and found that the available space became 22.4G.

8. Next, Xiao Y will be tested once with 360win 10 testing tool to see what the result is. It really passed the upgrade win 10 test.

9. Next, wait patiently for the official version of win 10 to go online! At that time, computers equipped with 360 security guards can upgrade win 10 through 360 for free.

Win 10 system failed to upgrade, and the solution of "insufficient system disk remaining space" is shared here. After simple setup, the system was upgraded successfully.