Hi ... I'm having exactly the same issue with my Refine MH - 1351 .... It worked OK for a month ... and now ... it drops the blade in the middle of the graphics and stops responding, cutter starts to make a funny noise. If you hit reset - that's the only thing that would do something - it'll bring the blade to start position. I tried different graphics. Sometimes it would cut 12" x 120" writing with no problems, but like today - I've had a 33.5" x 36" rectangle - it cut two times - dropped the blade. The pressure was not equal too. Then it would start cutting - and stop at the same place. I've tried five times - ruined pile of material - no luck. Shut the cutter down - cut it by hand. Total frustration !!! Please let me know if adding memory helped. I was more thinking of changing mother board. Or is it VISTA issue? But - it drops the the blade even if I'm not cutting, but just rewinding the decal. And guess what - the blade was right above some freshly cut graphics! DAMAGED AGAIN !!! :'( Please help!!!