Can’t install RemoteApp or Terminal Services ActiveX Control.

The TS ActiveX control (needed by TSWA) is disabled by default in XPSP3 as a security measure. You need to explicitly enable the Terminal Services ActiveX control in IE in order to use the ActiveX control (and hence TSWA).

Click on Manage Add-Ons in IE to enable the TS ActiveX control.

Are you using IE6 OR IE 7 to access TSWA?

If you are unable to see/enable the Terminal Services ActiveX control in IE7 on XPSP3 (we are investigating this known issue) as a workaround can you try deleting the following registry keys:

• HKCU\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{7390f3d8-0439-4c05-91e3-cf5cb290c3d0}
• HKCU\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{4eb89ff4-7f78-4a0f-8b8d-2bf02e94e4b2}

Once you delete these keys, the activeX control should be enabled within your supported Internet Explorer Browser.