Close all instances of Internet Explorer, click Start, point to Settings, and then click Control Panel.
Double-click Internet Options.
Click the Advanced tab.
Under Browsing, click to check the Enable third-party browser extensions (requires restart) check box.
Restart Internet Explorer.
These steps change the value data for the "Enable Browser Extensions" String value to "Yes" in the following registry key:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
Close all instances of Internet Explorer, click Start, point to Settings, and then click Control Panel.
Double-click Internet Options.
Click the Advanced tab.
Under Browsing, click to check the Enable third-party browser extensions (requires restart) check box.
Restart Internet Explorer.
These steps change the value data for the "Enable Browser Extensions" String value to "Yes" in the following registry key:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main