Motor is locking up after a few stitches but no... (by 3 users)

my sewing machine will sew maybe 10 stitches then the motor locks up (well what i think is the motor). i can still move the needle manually, the E6 message shows on the screen however no thread is caught . i then remove everything and start again, the same problem happens :( :( it makes a dreadful noise!

it is a new machine and i have hadly used it.

i have changed the needles, type of material thickness,cleaned under the bobbin, re threaded the needle and the rest of the machine, changed the tension. Please help!!