Thanks to All for your responses, I tested in a Desktop PC with the same config (P4 3.0ghz, 1gb RAM, etc etc) and the problem persist, I decide to use a Local repair service center.


I think the problem is like I describe Below:

The SE K750i (CID36BROWN Certificate) Comes with W700 Sofware, maybe the previous owner did not know the W700 firmware is not compatible with K750i CID36, 'cause W700 is CID49


The "flash" can cause damage in FS on K750i