/en/tags/windows-defender/Recent content in Windows Defender on Mi&Bee BlogHugo -- gohugo.ioen蓝宝石的傻话Fri, 03 Apr 2026 00:00:00 +0000/en/posts/system/windows-defender-exclusion-cleanup/Fri, 03 Apr 2026 00:00:00 +0000/en/posts/system/windows-defender-exclusion-cleanup/<p>When the Windows Defender exclusion list accumulates a large number of useless entries, you can clean them all at once with a PowerShell one-liner. This article details the entire process, including backup, cleanup, and verification.</p> <h2 id="prerequisites">Prerequisites</h2> <p>Modifying Defender configuration requires administrator privileges. Open a terminal with sufficient permissions as follows:</p> <ol> <li>Click the Windows Start menu and search for <strong>PowerShell</strong></li> <li>Right-click <strong>Windows PowerShell</strong> in the search results, then select <strong>Run as administrator</strong></li> <li>Click <strong>Yes</strong> in the User Account Control (UAC) window to confirm authorization</li> </ol> <h2 id="step-1-backup-existing-exclusions-highly-recommended">Step 1: Backup Existing Exclusions (Highly Recommended)</h2> <p>Before cleaning, it is recommended to back up the current exclusion list to prevent accidentally deleting entries you want to keep. If needed later, you can restore from the backup file.</p>