Have TomTom One V4 all working ok.
Thought try a new navcore and as suggested start with clear machine so used ttgo510-710.clear_flash.exe as downloaded from site.
Problem after installing TomTom shut down and now will not start and therefore does not show in windows explorer.
Any directions please.
After about 1hour it has come back on !!!
With more ram !!
Found correct clear flash to download from TomTom site under support section.
Nasty scare but should use only programme for my Tomtom number!