This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(57.599999999999994, 42%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAA%3C/text%3E%3C/svg%3E)
Hello, as you can read from the title, I cannot use Windows Defender. I disabled it in the past for the use of some musical programs for the university that couldn't run if it was on. I think that over time this has been the cause of the presence of many viruses inside my PC. In fact, now it's not only the defender who doesn't work I also can't go on with updates and I should; they say that I have to do important updates for security and quality
@Adriano Allegri
Hi,
Just checking in to see if the information provided was helpful.
If the reply helped you, please remember to accept as answer.
If no, please reply and tell us the current situation in order to provide further help.
@Adriano Allegri
Hi,
We have not get information from you for several days.
If the reply is useful for you, please accept as answer. It will be helpful to other members who have same questions.
If you have any other confuse, please reply to us directly.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(89.60000000000001, 81%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERA%3C/text%3E%3C/svg%3E)
Take a look at:
https://support.microsoft.com/en-us/windows/windows-update-troubleshooter-for-windows-10-19bc41ca-ad72-ae67-af3c-89ce169755dd
You may try restart your PC and then run the Windows Update again.
@Adriano Allegri
Hi,
Do you have another antivirus installed? If so uninstall it in Settings > Apps & Features. Restart PC and try Defender again.
The System File Checker tool repairs corruption in system files. Use this tool to verify whether Windows Defender is corrupted or not. To perform an SFC scan, do the following:
-Press Windows Key + X to open Win + X menu. Now select Command Prompt (Admin) or PowerShell (Admin) from the menu.
-Type the command sfc /scannow > hit ENTER > wait for the scan to complete.
If SFC can’t fix the problem, you might want to try using a DISM scan instead. To do that, just follow these steps:
-Start Command Prompt as administrator.
-When Command Prompt opens, enter DISM /Online /Cleanup-Image /RestoreHealth and press Enter to run the command.
Hope above information can help you.
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.