Suddenly, my Millie is darting across a quilt and stitching as she goes. Once, the tablet went black and she kept stitching, but began to go faster and faster. I had no way to stop the machine but to turn off at the side and carriage. Since, I can stitch out about two rows before she begins to do the bizarre stitching again. She came with windows 10 installed. No problems and loving her, until this. I cannot find how to defrag/repair the tablet. I have her plugged into a UPS and she is the only item on it. I am always in airplane mode. Desperate as I have a large number of quilts on my schedule. Thanks!!