Thank you for Administrator, above..
But the problem still going on..
1. Originally I have 4 disks.
RevuAhn SSD 250GB (C:), WesternDigital HDD 500GB (D:), Seagate Barracuda HDD 500GB (E:), and DVD-ROM Drive (F:).
The disk in problem is Seagate 500GB HDD. It is inside disk.
After problem occurs, my computer cannot recognize Seagate HDD.
So, E: drive is DVD-ROM and F: does not appear in either Disk Management window or Explorer window.
2. I changed the power line and data line, then I pushed power button.
Wow... the disk in problem vibrating for a while... but... stoped soon.
Accurately, vibration stoped when my screen displays below.
INTEL logo
BIOS Settings: <F2>
Boot Menu: <F10>
3. I entered BIOS settings.
F2 -> Advanced -> Drive Configuration
and I can see below...
SATA Port 0: RevuAhn_850X1S (256.0GB)
SATA Port 1: HL-DT-STDVD-RA ATAPI
SATA Port 2: [Not Installed]
SATA Port 3: [Not Installed]
So... my computer does not recognize Seagate HDD.
I think... WFH updating without unhiding hidden folders, caused this problem.
I am a fool, definitely... T.T
Fast reply, I hope, please...