What is windows-defender-disabler?

Windows Defender Disabler is a small portable Windows utility whose entire purpose is to turn off parts of Windows Defender, the antivirus software built into Windows. It targets Real-Time Protection and Tamper Protection specifically, along with related security features, and the README frames this as something someone might want temporarily while installing other software or troubleshooting a problem that Defender is interfering with. Using it means downloading a zip file from the project's releases, extracting it, and running the included executable as Administrator, which is required because disabling core antivirus protections needs elevated system permissions. From there, a simple interface lets someone choose to disable or re-enable the protections, either temporarily or persistently, and a restart may be needed afterward for the change to fully apply. The README is direct about the tradeoff involved: turning off Real-Time Protection and Tamper Protection lowers the overall security of the machine, since those are the features that catch and block malicious software as it runs. It recommends re-enabling Defender immediately after whatever task required it be off, downloading the tool only from the project's own GitHub page rather than a copy hosted elsewhere, and scanning the downloaded file with a service like VirusTotal before running it, along with creating a System Restore Point first as a safety net. The project is small, written in C#, and shared under the MIT license. Because it works by directly modifying Windows registry settings and stopping background security services, anyone considering it should treat it the same way as any tool that disables system protections: use it only if there is a specific, understood reason to do so, and restore normal protection as soon as the task it was needed for is finished.