After I installed TomTom 7 when the device start show the following error message:
BTTrayCE is not a valid application
Enable the “Show All Files” option.
Rename the BtCoreIf file with BtCoreIf_old in the Windows folder.
Make a SoftReset.
NOTE: in my case I was unable to use share internet connection function. After my solution it returned to work.
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