Error Message:  remote desktop web connection activex control could not be installed

Click on Tools -> Manage Add-Ons -> Enable or Disable Add-Ons in IE to enable the Terminal Services ActiveX control

In  IE7

• Tools
• Manage add-ons
• Enable or Disable Add-ons
• Show "Add-ons that have been used by Internet Explorer
• Correct add-on in my computer is --->  "Microsoft RDP Client Control (redist)"
• Enable it
• click ok

The reason for this is that the Terminal Services ActiveX control 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.

If the ActiveX control is not listed in Manage Add-ons dialog, follow Method 2 below.

 Method 2

Close Internet Explorer and browse to the folder c:\windows\downloaded program files through My Computer.  Locate a file called Microsoft RDP Client Control (redist).  Right-click on the file and remove the program.  You will be prompted that it will be removed permanently, click yes.

Open up Internet Explorer and browse to https://virtualab.dmacc.edu.  The same error will appear only this time you will see a bar at the top of the page.  It will say "This website wants to install the following add-on..."  Click on the bar and select "Install ActiveX Control".  A warning message will appear, click "Install".

You should be able to log into virtualab.

Method 3

1. Click Start, Run. Type Regedit.exe and press ENTER

2. Navigate to the following branch:

HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Ext \ Settings

3. Double-click Settings to expand the branch

4. Right-click {7584c670-2274-4efb-b00b-d6aaba6d3850} and choose Delete

5. Click Yes when asked for confirmation.

Close all instances of Internet Explorer and re-run Remote Desktop Web Connection.

Registry Fix

To automate the above, download tsweb-enable.zip and save to Desktop. Extract the contents and run the file tsweb-enable.reg file. To reverse the changes, run tsweb-disable.reg.