Thanks for the reply...
Windows XP, and whatever client ships with ConfigMgr 2007 R2 SP2.
All clients are XP - 700 or so have installed successfully, with only a handful exhibiting the "Found New Hardware" symptoms.
I've noted that on some machines, when I go into the driver properties for the ConfigMgr Remote Control driver it is listed as unsigned, and only one driver file is listed (C:\WINDOWS\system32\DRIVERS\smsmdm.sys) - as opposed to the two files as reported on some other clients which show the driver as signed.
I'm confused to be honest - the vast majority of clients appear to have installed successfully (even those with the Remote Control Driver issue), but there is clearly something not quite right about this component. What is the function of the Remote Control Driver, and should it be reported as signed on all machines that have the client installed?
Could a local conflict result in the driver not being installed fully, leading to the "unsigned" issue?
Kelvin