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Practical operating systems guides and troubleshooting. Browse Operating Systems guides with practical instructions, troubleshooting steps, and related.

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# Operating Systems




An operating system is the software that manages a computer's hardware, applications, files and user sessions.




Practical operating systems guides and troubleshooting.


 


## Which operating-system guide should I choose?




Choose the family and version installed on the computer you are supporting. Windows, Linux and Windows Server use different tools and permission models. A familiar-looking desktop does not guarantee that a command or setting applies to that version.




## What information should I collect first?




Record the operating-system version, the problem and any recent change. Use a system-information guide if the version is unclear. Follow the guide's supported platforms and expected result before trying the same instructions on another machine.


 


[**Windows**Windows instructions, reference material, and troubleshooting.](https://screensie.com/knowledge-base/windows/)
[**Linux**Linux instructions, reference material, and troubleshooting.](https://screensie.com/knowledge-base/linux/)
[**Windows Server**Windows Server instructions, reference material, and troubleshooting.](https://screensie.com/knowledge-base/windows-server/)




## Guides




[Operating Systems

### How to Take a Screenshot in Windows

Capture the whole screen, one window, or a selected region. 6 min · Easy](https://screensie.com/knowledge-base/operating-systems/windows/take-screenshot-windows/)