h640p firmware update faliure

So I've tried to update firmware to my device and I did something wrong when i plugged it into computer it was named idk like what but at the end was "in fs mode" I really don't know what to do with it buttons on tablet seems to work but when i take pen and move it on surface it doesn't do anything i've tried reinstalling drivers plugging it into other usb port and to phone, on phone when i moved pen on tablet surface cursor on thelepone was in some kind moving but not smooth like it was teleporting it uploaded its position in like second or two. If u could help me in  some kind I would really appreciate that.

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