国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

目錄
Check if Another Antivirus Is Blocking It
Run the Windows Security Center Troubleshooter
Repair System Files Using Command Prompt
Make Sure Windows Is Up to Date
首頁 電腦教學(xué) 故障排查 為什麼Windows Defender不打開,我該如何啟用?

為什麼Windows Defender不打開,我該如何啟用?

Jul 09, 2025 am 01:56 AM

Windows Defender可能因第三方殺毒軟件衝突、系統(tǒng)設(shè)置問題或損壞的系統(tǒng)文件而無法開啟。解決方法如下:1.檢查並卸載其他殺毒軟件,重啟後重新啟用;2.運(yùn)行Windows安全中心疑難解答以修復(fù)系統(tǒng)問題;3.使用管理員權(quán)限打開命令提示符並執(zhí)行sfc /scannow和DISM命令修復(fù)系統(tǒng)文件;4.確保Windows系統(tǒng)已更新至最新版本。以上步驟通??山鉀Q大部分問題。

Why is Windows Defender not turning on, and how can I enable it?

Sometimes Windows Defender doesn't turn on because of conflicts with other antivirus software, system settings, or corrupted system files. The good news is that most issues preventing it from running can be resolved without too much hassle.

Why is Windows Defender not turning on, and how can I enable it?

Check if Another Antivirus Is Blocking It

Windows Defender automatically disables itself when it detects another antivirus program installed. If you recently installed third-party security software (like Norton, McAfee, or Bitdefender), that's likely the reason.

  • Go to Settings > Update & Security > Windows Security > Virus & threat protection .
  • Click “Manage settings” under Virus protection.
  • If it says “Off (from another provider)” next to Real-time protection, then another antivirus is active.

To re-enable Windows Defender:

Why is Windows Defender not turning on, and how can I enable it?
  • Uninstall the third-party antivirus via Control Panel > Programs > Uninstall a program .
  • Restart your computer and check again in Windows Security.

Run the Windows Security Center Troubleshooter

If no other antivirus is installed and Windows Defender still won't turn on, there might be a system issue. Windows has a built-in troubleshooter that can detect and fix common problems.

  • Open Settings > Update & Security > Troubleshoot .
  • Scroll down and click on Windows Security Center .
  • Run the troubleshooter and follow any suggested fixes.

This tool often catches small glitches or permission issues that prevent Defender from starting properly.

Why is Windows Defender not turning on, and how can I enable it?

Repair System Files Using Command Prompt

Corrupted system files can also stop Windows Defender from functioning correctly. Running a few commands in Command Prompt can help fix this.

  • Right-click the Start menu and select Windows Terminal (Admin) or Command Prompt (Admin) .
  • Type these commands one at a time, pressing Enter after each:
 sfc /scannow
 DISM /Online /Cleanup-Image /RestoreHealth

These commands scan for and repair corrupted system files. The process may take some time — don't interrupt it.

Once done, restart your PC and try turning on Windows Defender again.

Make Sure Windows Is Up to Date

Microsoft regularly releases updates that include bug fixes and security improvements. If your system isn't updated, you might be missing patches that affect Windows Defender.

  • Go to Settings > Update & Security > Windows Update .
  • Click Check for updates and install any available ones.
  • Restart your computer after installing updates.

After updating, go back into Windows Security and see if Defender is now working.


That's usually all it takes to get Windows Defender running again. Most issues come down to conflicting software or minor system glitches — nothing too serious. Just start with the easiest fix first, like checking for other antivirus programs, and work your way through the steps if needed.

以上是為什麼Windows Defender不打開,我該如何啟用?的詳細(xì)內(nèi)容。更多資訊請關(guān)注PHP中文網(wǎng)其他相關(guān)文章!

本網(wǎng)站聲明
本文內(nèi)容由網(wǎng)友自願投稿,版權(quán)歸原作者所有。本站不承擔(dān)相應(yīng)的法律責(zé)任。如發(fā)現(xiàn)涉嫌抄襲或侵權(quán)的內(nèi)容,請聯(lián)絡(luò)admin@php.cn

熱AI工具

Undress AI Tool

Undress AI Tool

免費(fèi)脫衣圖片

Undresser.AI Undress

Undresser.AI Undress

人工智慧驅(qū)動的應(yīng)用程序,用於創(chuàng)建逼真的裸體照片

AI Clothes Remover

AI Clothes Remover

用於從照片中去除衣服的線上人工智慧工具。

Clothoff.io

Clothoff.io

AI脫衣器

Video Face Swap

Video Face Swap

使用我們完全免費(fèi)的人工智慧換臉工具,輕鬆在任何影片中換臉!

熱工具

記事本++7.3.1

記事本++7.3.1

好用且免費(fèi)的程式碼編輯器

SublimeText3漢化版

SublimeText3漢化版

中文版,非常好用

禪工作室 13.0.1

禪工作室 13.0.1

強(qiáng)大的PHP整合開發(fā)環(huán)境

Dreamweaver CS6

Dreamweaver CS6

視覺化網(wǎng)頁開發(fā)工具

SublimeText3 Mac版

SublimeText3 Mac版

神級程式碼編輯軟體(SublimeText3)

如何修復(fù)KB5060533無法在Windows 10中安裝? 如何修復(fù)KB5060533無法在Windows 10中安裝? Jun 12, 2025 am 10:00 AM

Windows Update是一個必不可少的功能,可提供安全性改進(jìn),性能補(bǔ)丁和功能增強(qiáng)功能。但是,這也是最合作的公司之一

如何修復(fù)KB5060999無法在Windows 11中安裝? 如何修復(fù)KB5060999無法在Windows 11中安裝? Jun 13, 2025 am 12:00 AM

Windows Update KB5060999於2025年6月10日發(fā)布,是Windows 11版本22H2和23H2的累積更新,覆蓋構(gòu)建22621.5472和22631.5472。它

指南:恆星刀片保存文件位置/保存文件丟失/不保存 指南:恆星刀片保存文件位置/保存文件丟失/不保存 Jun 17, 2025 pm 08:02 PM

Stellar Blade在Windows PC上保存文件位置:在哪裡可以找到它,如何備份遊戲數(shù)據(jù)以及如果丟失保存文件或遊戲沒有保存該怎麼辦。該Minitool指南提供了詳細(xì)的說明和解決方案。

沙丘:覺醒網(wǎng)絡(luò)錯誤:這是一個綜合指南 沙丘:覺醒網(wǎng)絡(luò)錯誤:這是一個綜合指南 Jun 12, 2025 pm 06:02 PM

遇到《沙丘:覺醒》連接問題了嗎?許多玩家報告遇到了與網(wǎng)絡(luò)相關(guān)的各種錯誤代碼。本指南來自 MiniTool,將涵蓋適用於 PC 的所有修復(fù)《沙丘:覺醒》網(wǎng)絡(luò)錯誤的方法??焖賹?dǎo)航 :- 沙丘:覺醒 網(wǎng)絡(luò)錯誤 - 如何修復(fù)《沙丘:覺醒》網(wǎng)絡(luò)錯誤 - 結(jié)語 沙丘:覺醒 網(wǎng)絡(luò)錯誤 ----------------------------- 遭遇《沙丘:覺醒》網(wǎng)絡(luò)錯誤可能會阻礙玩家登錄遊戲並導(dǎo)致他們無法加入服務(wù)器、網(wǎng)絡(luò)超時或延遲,甚至在遊戲過程中彈出錯誤信息。通過瀏覽大量文章和論壇,我們發(fā)現(xiàn)存在多個《沙丘:

根據(jù)PC上的視頻記憶中的視頻記憶喚醒的沙丘修復(fù)程序 根據(jù)PC上的視頻記憶中的視頻記憶喚醒的沙丘修復(fù)程序 Jun 10, 2025 pm 06:02 PM

當(dāng)遊戲用完視頻記憶時,這是一個令人沮喪的問題,如果他們已經(jīng)在大廳裡,可以阻止玩家進(jìn)入遊戲,甚至可以斷開連接。這是Minitool的指南,提供了修復(fù)沙丘的實(shí)用解決方案:AWA

如何修復(fù)KB5060829未安裝和其他報告的錯誤 如何修復(fù)KB5060829未安裝和其他報告的錯誤 Jun 30, 2025 pm 08:02 PM

應(yīng)用Windows 11 Update KB5060829之後,許多用戶遇到了安裝問題和一些意外問題。如果您面臨類似的困難,請不要驚慌。該Minitool指南介紹了解決KB5060829的最有效的修復(fù)程序

Windows 11 KB5063060 OOB更新24H2,主要功能 Windows 11 KB5063060 OOB更新24H2,主要功能 Jun 12, 2025 pm 08:01 PM

Windows 11 24H2收到了一個新的更新KB5063060,這是一個不錯的發(fā)行版,可在啟動Fortnite之類的遊戲時解決系統(tǒng)崩潰。在Minitool的本指南中,您可以探討此更新的詳細(xì)信息。此外,我們提供了一些求解

如何修復(fù)KB5060842無法在Windows 11中安裝? 如何修復(fù)KB5060842無法在Windows 11中安裝? Jun 12, 2025 am 10:01 AM

KB5060842是一個Windows 11累積更新,該更新在Microsofts常規(guī)維護(hù)計劃下發(fā)布,稱為Patch Tuesday。累積更新旨在提高

See all articles