Remote Desktop Connection problem with multiple Lenovo machines

Hello,
I've been running into issues with connecting to some of the latest Lenovos we purchased using RDP. It has happened with a batch of 3 x220s and a batch of 2 Thinkstation C20s (possibly others that I haven't yet had to remote into).
The symptoms are maddening in the paucity of information given for the failure. It basically goes like this -- type in the name of the computer and hit connect. Immediately I get a "this computer can't connect to the remote computer"; it's so sudden that it seems to be getting rejected immediately. I've check every windows log (even the ones under Applications and Services) and the ONLY thing logged (on the destination computer) is that an RDP session was initiated. NO reason is given for the failure. No error event given.
Has anyone else run into this? I'm having to use 3rd party software to log in to computers, which is becomming a nuisance as I am trying to set up computers at a branch office for new users. Is there some way to debug RDP? I ran a packet sniffer and a total of 6 packets are passed for these "sessions" -- mostly TCP handshake packets at that, and only one actual RDP packet. Is there a more verbose log I should be looking at?
Any help would be greatly appreciated!

If you can't connect to your new or restored Lenovo with the OEM install of Windows 7, it may very well be that the particular registry key below is not set to the typical default value (I think Lenovo has messed up their OEM install image). The two secrity packages 'tspkg' and 'pku2u' are missing on OEM Lenovo images.
This registry key:
HKLM\system\currentcontrolset\control\lsa\security packages
Should look like this:
kerberos msv1_0 schannel wdigest tspkg pku2u
Fix it and RDC will connect.
(may need a reboot to take effect)

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    Regarding more information about RDP, please take a look at the following articles:
    Remote Desktop app help
    Remote Desktop Connection: frequently asked questions
    Best regards
    Michael Shao
    TechNet Community Support

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