How to reset your Internet Explorer proxy settings

This article provides solutions on how to reset internet Explorer proxy settings when malicious software changes the proxy settings.

Original product version:   Internet Explorer 9, Internet Explorer 10, Internet Explorer 11
Original KB number:   2289942

Summary

Malicious software may change Internet Explorer proxy settings, and these changes can prevent you from accessing Windows Update or any Microsoft Security sites.

Cause

Certain strains of malicious software can prohibit a computer from being able to access Windows Updates or Microsoft Security Sites. For example, an attempt to access a Microsoft site, such as the following sites, results in being redirected to another page:

  • https://www.update.microsoft.com
  • https://www.microsoft.com/security_essentials/

Resolution

To work around this problem, follow these steps to reset your Internet Explorer proxy settings:

Important

This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see: 322756.

  1. On Windows XP, click Start, or on Windows Vista or Windows 7, click start., and then click Run. On Windows 8 or Windows 8.1, to access the Run command, press the Windows logo key + R. Or, swipe in from the right edge of the screen, and then tap Search (or if you are using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, and then click Search). Type Run in the search box, and then tap or click Run.
  2. In the Run text box, copy (CTRL+C) and paste (CTRL+V) or type the following:
    reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings /v ProxyEnable /t REG_DWORD /d 0 /f
  3. Click OK.
  4. On Windows XP, click Start, or on Windows Vista or Windows 7, click start., and then click Run. On Windows 8 or Windows 8.1, to access the Run command, press the Windows logo key + R. Or, swipe in from the right edge of the screen, and then tap Search (or if you are using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, and then click Search). Type Run in the search box, and then tap or click Run.
  5. In the Run text box, copy (CTRL+C) and paste (CTRL+V) or type the following:
    reg delete HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings /v ProxyServer /f
  6. Click OK.

More information

For more information about how to protect your computer from viruses or other malicious software, see How to prevent and remove viruses and other malware.

For more information about antivirus software vendors, see List of antivirus software vendors.