Windows Boot Manager
Windows failed to start. A recent hardware or software change might be the cause.
To fix the problem......

Status: 0xc0000225
Info: An unexpected error has occurred.

When creating the VM in VirtualBox it asked me for the guest OS which I choose “Windows 7″, thinking that by doing this, it would all work!

To resolve this error, thankfully its a simple fix:

• Power Down the Virtual Machine
• Go to the Settings of the Virtual Machine
• Under “System” tick on “Enable IO APIC”

(Reference)

Enter: Pdftk – The PDF Toolkit

Downloading the Zip file, and in the bin folder was pdftk.exe and libiconv2.dll. Running the pdftk.exe via the command line fired it up into action.

pdftk A=one.pdf B=two.pdf cat A1 B1 output combined.pdf

I done some command line trickery with dir > outputlist to get a single pdftk command with all the documents.
Other Examples of pdftk can be found at: http://www.pdflabs.com/docs/pdftk-cli-examples/

To find out the results and to see if chkdsk found any errors, look in the “Event Log” and under Applications -> “Wininit” you will see the chkdsk results

 To create a chkdsk, in “Computer”, right-click on the Disk Drive, Properties, Tools, Check.
To find the “Event Viewer”, inside the Control Panel is Administrative Tools -> Event Viewer
Running a chkdsk can solve many problems such as when a file/folder cannot be removed, or if a program can/can’t be (un)installed. In my case it prevented Vista SP2 from being installed.

Ref: http://www.tomshardware.com/forum/2172-63-win7-chkdsk-file-location
( event viewer, applications, under “wininit )

• windirstat

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If you have an old Eircom Netopia Router, you should be able to set it up as a Wireless Extender. See the how-to at:

• http://danielflannery.ie/how-to-extend-your-wifi-range-using-a-netopia-2247nwg3347wg/

The trick involves booting from a Windows CD, getting to a repair Command Prompt, replacing the utilman.exe file with cmd.exe, booting Windows up as normal, and then clicking the “Ease of Access” button on the login screen to bring up a Command Prompt to issue: net user administrator newpassword

What you need to reset the Password

• A Windows installation DVD (or reinstallation DVD)
  (If you have Vista installed, you’ll need a Windows Vista DVD. If you have Windows 7, you’ll need a Windows 7 Microsoft DVD).

Reset the Windows Password

• Insert the Windows installation DVD
• Reboot the PC and boot from CD/DVD
• Choose “Repair”. Under the Repair menu, look for “Command Prompt”.
• In the Command Prompt, issue the following commands below:

c:
cd\
dir
#(You should see some folders listed. If you don't see Windows, change to the d: drive. d:)
cd Windows
cd System32
move Utilman.exe Utilman.exe.bak
copy cmd.exe Utilman.exe

• Reboot the PC and start Windows
• Click the “Ease of Access” button on the bottom left (or press Windows + U)
• In the resulting Command Prompt window, issue the folllowing:

net user administrator newpasswordhere
#(to list all local usernames, just type "net user")

• Close the Command Prompt and Login
• Rename and move the files (utilman.exe) back.

Further information: youtube has many videos showing a step by step process. See: http://www.youtube.com/watch?v=Ar-VoO9ogHc

This above method helped me quickly reset the Windows Password without having to go making a special boot CD such as the Offline NT Password and Registry editor.