BOOTMGR is compressed

You will have to download and create this CD to enable you to get to a Command Prompt and then follow the instructions in the KB Article. Burn the ISO to CD using Nero or similar.

How to use the Bootrec.exe tool in the Windows Recovery Environment to troubleshoot and repair startup issues in Windows Vista

http://support.microsoft.com/kb/927392

The Windows Vista Recovery CD can be used to Boot your PC.

Creating a Windows Vista Recovery CD

http://blogs.techrepublic.com.com/window-on-windows/?p=622

Download from here:

http://coblitz.codeen.org/neosmart.net/downloads/guides/Vista_Repair/Vista_Recovery_Disc_x86.iso

Keep us informed as to your progress if you require further assistance. ;) :D

Then you have Two ways to Fix that.

(No 1 Way)
Boot from the Vista DVD.
Click ?Repair my Computer?
At the prompt to select your OS installation, click the button that says ?Load Drivers?. This should bring up a explorer-style drive browser.

Then just right-click on the drive you tried to compress, and deselect ?Compress this Drive?, which should still be ticked on. Hit apply, and apply to subfolders/files.

Reboot.

If that don?t work for you then!

(The Second way)
If the previous method does not resolve the problem, you can rebuild the BCD store by using the Bootrec.exe tool in the Windows Recovery Environment. To do this, follow these steps:

- Get your Vista installation DVD and pop it into your drive.
- Then restart your computer.
- Press a key when you are prompted.
- Select a language, a time, a currency, and a keyboard or another input method, and then click Next
- Click Repair your computer
- Click the operating system that you want to repair, and then click Next
- In the System Recovery Options dialog box, click Command Prompt
- Type bootrec /rebuildbcd and then press ENTER

? If Bootrec runs successfully, it will present you with the installation path of a Windows directory. To add the entry to the BCD store, type Yes . A confirmation message appears that indicates the entry was added successfully.

? If Bootrec cannot locate any missing Windows installations, you must remove the BCD store, and then you must re-create it. To do this, type the following commands in the order shown below: (Remember to press ENTER after each command)

bcdedit /export C:\BCD_Backup

ren c:\boot\bcd bcd.old

bootrec /rebuildbcd

- Restart the computer.