I've got similar message in Event Log since day one (Dec 05) every time, when my Surface 3 LTE modem is rebooted: disabled/enabled.
Description:
"The device Surface IA7260 Firmware Update (location (unknown)) is offline due to a user-mode driver crash. Windows will attempt to restart the device 5 more times. Please contact the device manufacturer for more information about this problem".
At the same time I cannot say I am happy with LTE module work compare with my 2 years old Surface 2 LTE. I am using (aka testing) new unit at exactly the same conditions as old one. Twice a day i have 1 hour trip on a train, where my LTE connection is heavily
used. With Surface 2 LTE I never had a problem during the whole trip. With Surface 3 LTE i have to reboot it at least once, because at some moments it loses ability to reconnect completely and only full machine reboot can fix it. It looks like happened randomly
in different places. It also loses connection if I don't move (turn on LTE in the office, e.g.) either, but in this case it might be reconnected without unit reboot.
Note: I keep all Windows update always up to date. Broadband provider is Bell. I've checked area near SIM card - not even warm. Same SIM is working perfect in my old Surface 2 (with Micro-Nano adapter). It is already second Surface 3 LTE unit with the same
behavior (i exchanged first, guessing it is hardware defect).
All modem software settings in Sur 2 and Sur 3 are the same.
If i do not find a solution until my 30-days period over, i will give it back to store.