F8 "Repair Your Computer" Stops Working With 0xc000000e

I tried to verify whether the F8 restore factory function is working in my dell inspiron 1545. I got this error -

Windows failed to start. A Recent hardware or software change might be the cause. To fix the problem:

1. Insert your windows installation disc and restart your computer.

2. Choose your langugae settings, and then click next

3. Click "repair your computer."

Status: 0xc000000e
Info: The boot selection failed because a required device is inaccessible.

there is only one operation system - windows 7 home premium installed. it boots correctly. I found a thread at - Windows 7, "Repair your computer" F8 boot option not working (SOLVED) | Knowledge Base. it utilizes bcdedit to fix the problems.

for my case, the output of bcdedit /enum all shows unknown device as well. but I also noticed my output has 2 different guids. i have no idea which one indicates which partition at all. there is the output of bcdedit.

Code:
Windows Boot Manager
--------------------
identifier {bootmgr}
device unknown

[Code].....