For one of the PC’s I did a reset on, and RWW/RDP is working. . .the key under HKLM in ‘Operation 1′ is NOT  there (looking for “{7584C670-2274-4EFB-B00B-D6AABA6D3850}” and NOT “ClsID”). The key IS there under HKCU as described in Operation 2′.

Note the “Key name” is “{7584C670-2274-4EFB-B00B-D6AABA6D3850}” and not “ClsID”. . .

. . . this is a known issue which hasn’t been fixed. However, you can check if the following workaround can be applied to the workstation:

1. Click Start-> Run  type Regedit  Then open register list.
2. Follow the below operation 1 or operation 2 to modify the register: ClsID: {7584C670-2274-4EFB-B00B-D6AABA6D3850}

Operation 1. two Methods to enable the “TS Component” displayed in “Add-on Management” list.
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a. Add Key Under:
HKLM\Software\Microsoft\Windows\CurrentVersion\Ext\PreApproved
The Key name is ClsID.

b. Add Key Under:
HKCU\Software\Microsoft\Windows\CurrentVersion\Ext\Stats
The Key name is ClsID,
and then, add subkey, “iexplore”
and then, add “DWORD Value” in “iexplore” key, value name “Flags”, set value to 4

Operation 2. Enable the component could be used in IE7, delete key: HKCU\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\ClsID
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1. Close the register.
2. Open website. Direct to the Remote web workplace.
3. click Connect to Server Desktops . It will show a warning, then click OK button.
4. On the right-below of web, there will occur a little-image of warning, move cursor on it, it will show Manage add-ons
5. Double click the little-image, show a dialog Manage Add-ons
6. Confirm the Show: items is add-ons currently loaded in Internet Explorer
7. On the Disabled item, click Microsoft Terminal Services Client Control (redist) 
8. On the Manage Add-ons  dialog down, in Settings scope, choose Enable  it will pop a dialog, click OK button
9. Click OK button.