Blue screen on janome 11000

Skipped stitches sometimes occur if the machine is incorrectly threaded. Remove the thread and re-thread from the beginning (first RAISE the presser foot so the thread will seat in the tension disk).
Confirm that the thread follows the correct pathway (consult manual).
Try installing a brand-new needle.
Make sure the needle, thread, and fabric are compatible.

All About Needles

If it continues to not pull up the bobbin thread, the needle/hook could be out of time. May require service.

Sewing machine won pick up bobbin thread hook timing fix

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you said it has been in the shop twice do you think that may be they did not check the circuit board out I think it might be in the timing or the board

Memory Craft 11000

Version 2.10 update is available for owners of MC11000 Version 2.01 and MC11000 Special Edition. Version 3.10 update is available for owners of MC11000 Version 3.00 and MC11000SE Version 3.00 with the purchased Professional Quilting Kit Version 3.00. This is not the update program for the owner of MC11000 Version 1.31 or earlier.

Have you tried customer service for the software of your machine?
sometime it depends on the window your using you might have to keep using your old laptop. I had to revert back to an older model computer in order to continue with my machine but it was a different sewing machine. Check with the cs of you software im sure its cost you a lot. Hope that helps

it could be a computer problem, I suggest having it checked

Thanks to floraq803, we have our 11000 working again. The needle threader was stuck in the down position. We turned off the machine, and turned the wheel (which controls where the needle is) until the needle threader bar was straight (approximately 1/2 way between the needle being all the way down and all the way up). Turned on the machine and the threader came back up again. Now back to sewing.

Simply contact your nearest Janome dealer, or the Head office in your country and they will be pleased to assist and outline the options available.

go to driverskit and download it