iSumsoft » Resources » Windows 10 » Compress Your Windows 10 System using Compact OS

Compress Your Windows 10 System using Compact OS

If you're running on Windows 10, you can use Compact OS to compress the files for the operating system, including desktop applications, so that it can free up disk space.

Compress Windows 10 System with Compact OS

Compact OS is supported on both UEFI-based and BIOS-based devices. Compact OS installs the operating system files as compressed files. The best choice to avoid risk is to backup your system and files before enabling it.

How to Get Start with Compact OS

Step 1: OpenOpen Command Prompt as administrator.


Step 2: To query current system compact state, execute command below, then hit Enter key

compact /compactOS:query


Then you can see the current system is not compacted state (compressed). Go to enable it as Step 3 shows.

Step 3: To compress Windows 10 OS, execute command below, and hit Enter key.

compact /compactOS:always


Tip: You can turn it off by excuting command below to decompress Windows 10 OS:

compact /compactOS:never


Potential risks of Compact OS you need to consider

Power loss: You may suffer a sudden loss of power while compressing or decompressing the Windows directory. If this occurs, it could potentially make the system unbootable and even unrecoverable. So the best option is to perform a complete backup before starting the process, and make sure your computer is plugged into power.

Performance loss: Athrough enable compact OS can save disk space, there is some concern that it may reduce functionality on systems, while nobody notice there is performance loss whatsoever.