I assume by "deselect the 'Interface Status' " you mean change a Locked port to Unlocked.But what I mean by "Disable Port Security" is turn off Port Security for all ports, so no ports will be ever be Locked. I've tried every trick I can think of in...
We've had similar problems with the SG220-50P. Spontaneous reboots, ports going down. They replaced one unit but still reboots every month or so, or maybe more.