AR41M won't boot from DVD Rom

hi there,

i know I have done a very stupid thing. I was trying to install a clean windows vista by using Windows Anytime Upgrade, but I forgot to back up the file called " cert.xrm-ms", and I can't active my windows, and now I want to start it from the way it was by recovering the system, but when I put the system recovery disk in and restart the computer, it won't boot from the system recovery disk, it goes straight away to windows. how come?

help me please, thank you all

 

Hello

Check if the Cd/dvd of your computer is working!!! If not . Fallow this step

-Restart the computer.
NOTE: Wait a few seconds for the CD/DVD to be detected before double-clicking to access it.

-Ensure the disc is clean and free of smudges, fingerprints and scratches, and that it is inserted correctly.
NOTE: The label should be facing up for CD and single sided DVD discs.

-Try a different disc in the drive.
IMPORTANT: If another disc works in the drive, the disc may be damaged in some way or is not readable.

-Turn off the computer.
Unplug the computer from the AC power outlet for 30 seconds, then plug it back into a known working AC outlet.
-If the drive is removable, ensure the drive is properly connected and has power.
Turn on the computer.
-If the computer is a notebook, ensure the drive is enabled in VAIO Power Management.
-Ensure no hardware resource conflicts are present.
-Ensure a third-party application is not blocking access to the drive.
-Ensure no unsupported WIN.INI or SYSTEM.INI drivers are loading.
-Perform a system restore to a point when the CD/DVD drive was functioning properly.
-Check for a possible virus on the computer.
-Remove the upper and lower filters from the registry.
Click the Start button, and then click Run.
In the Run window, next to Open:, type: regedit
Press the Enter key.
In the Registry Editor window, in the left pane, double-click the HKEY_LOCAL_MACHINE folder.
In the HKEY_LOCAL_MACHINE folder, double-click the System folder.
In the System folder, double-click the CurrentControlSet folder.
In the CurrentControlSet folder, double-click the Control folder.
In the Control folder, double-click the Class folder.
In the Class folder, click to select the {4D36E965-E325-11CE-BFC1-08002BE10318} folder.
In the right pane, click to select the UpperFilters registry value.
On the menu bar, click Edit.
In the Edit menu, click Delete.
In the Confirm Value Delete dialog box, click the Yes button.
In the right pane, click to select the LowerFilters registry value.
On the menu bar, click Edit.
In the Edit menu, click Delete.
In the Confirm Value Delete dialog box, click the Yes button.
NOTE: Do not delete the UpperFiltersBak or LowerFiltersBak registry values.
Close the Registry Editor window.
Restart the computer.
-Perform a system recovery

 

thank you very much babedarklord, the DVD Drive is working probably, it just can't boot the system recovery disk up, thanks again babedarklord