Hello,
Thanks for your post and Merv's input.
In addition, please try to install/reinstall the latest Remote Desktop Connection 7.0 client update on that problematic Windows Vista client to have a try:
Description of the Remote Desktop Connection 7.0 client update for Remote Desktop Services (RDS) for Windows XP SP3, Windows Vista SP1, and Windows Vista SP2
http://support.microsoft.com/kb/969084
If the issue persists however, you may consider a Clean Boot on the Windows Vista client:
Clean boot
=================
Let's disable all startup items and third party services when booting. This method will help us determine if this issue is caused by a loading program or service. Please
perform the following steps:
1. Click the Start Button type "msconfig" (without quotation marks) in the Start Search box, and then press Enter.
Note: If prompted, please click Continue on the User Account Control (UAC) window.
2. Click the "Services" tab, check the "Hide All Microsoft Services" box and click "Disable All" (if it is not gray).
3. Click the "Startup" tab, click "Disable All" and click "OK".
Then, restart the computer. When the "System Configuration Utility" window appears, please check the "Don't show this message or launch the System Configuration Utility
when Windows starts" box and click OK.
Please test this issue in the Clean Boot environment, if the issue disappears in the Clean Boot environment, we can use a 50/50 approach to quickly narrow down which entry
is causing the issue.
For more information about this step, please refer to the following KB article:
How to troubleshoot a problem by performing a clean boot in Windows Vista
http://support.microsoft.com//kb/929135
Hope it helps.
Best regards,
Robbin Meng(MSFT)
Microsoft Online Newsgroup Support