Internet Explorer, together with Windows Vista and later operating systems, include several layers of defense to prevent unwanted software from modifying the Internet Explorer configuration. However, if an unwanted toolbar appears in Internet Explorer, you can disable it using the Add-on Manager. For more information, read the section titled "Add-on Manager Improvements" earlier in this chapter. If the problem persists, start Internet Explorer in No Add-ons mode, as described in the section titled "Internet Explorer Add-ons Disabled Mode" earlier in this chapter. Then use the Add-on Manager to disable all add-ons that you have not intentionally installed
To prevent unwanted software, ensure that you have all Microsoft security updates installed and are using anti-malware software, such as Microsoft Forefront or Windows Defender. For more information about installing security updates, read Chapter 23, "Managing Software Updates ." For more information about Microsoft Forefront and Windows Defender, read Chapter 24 .
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