Thread: opus 120 watt psu restarts computer when i start car..???

i have the 120 watt opus psu ( http://www.mp3car.com/store/product_...products_id=95 )
and if i shut my car off then get back into it and start it again, before the pc shuts down, it reboots my computer... why? it just started doing this and it worked perfectly before, i dont know if its the cold weather that we recently got, or what the problem is. has anyone experienced this before? i bought an opus to stay away from problems like this

thanks
nick