Spent 2 1/2 hours yesterday with mum's TomTom Sat Nav. She bought the latest maps for it.
Would they hell as install on the unit. She spent a further 2 hours after I'd left, still not working.
Looks like I'll be calling round to hers again tomorrow.
Technology, love/hate it 
Spent another hour at mums, sat nav still won't format, won't update the new maps and won't work at all. Bricked !!
Brought it home with me, fired up my trusty el-cheapo lappy, and plugged the sat nav in.
Bob's your uncle, formatted, new maps installed. 100% AOK
