Looks as though they have just released the 'fixed' version, 4.0.2.2123. I've installed it here, and no issues with XP now.
Details on TomTom site here >>> https://en.discussions.tomtom.com/g...000-mydrive-176/mydrive-windows-xp-fix-977031
Could it be that the fix needs SP3?Windows SP2
First off, I appreciate the help. I've just about giving up getting V4 or "any" version to work on my desktop. I did successfully install V4 on my laptop (WinXP Pro SP2) but getting the driver not found error. Will try the advice at https://uk.support.tomtom.com/app/answers/detail/a_id/16339/related/1 and see if that is the ticket. Will get back to you.