Preventing Pre-OS environment from starting

[ynavad]

On a Windows 2003 server I needed to re-size (reduce) the data partition (D in order to increase the system partition (C. I used AOMEI Partition Assistant Lite Edition 5.1, which is free. The program said it needed to do this in a Pre-OS environment, so I clicked OK to re-boot.

The server never came back to life, but stalled with a message which reads
the operation abort - information code 12
disk environment has changed - please reboot

Pressing any key had no effect, so I was forced to power off, but then the same thing happens.
I can't find a way to stop the AOMEI Pre-OS from starting.

I have emailed their support section twice in 24 hours, but have still had no reply, and I am getting desperate (and so are the users!).

I have managed to get into the recovery console from the Server 2003 CD, but I still don't know how to prevent the automatic startup in this Pre-OS mode.

I'd be very grateful for any ideas.

 

[ynavad]

Reply has now been received from Aomei and the problem solved.

I had already managed to get into the Recovery Console. From there all I needed to do was delete the file ampa.exe in C:\Windows.

It was also suggested that the problem could have been solved by
Pressing F8 at startup and choosing Last Known Good Config
or
Booting from a Windows PE disk and then deleting the file above (C:\Windows\ampa.exe)[/li][/li]

I am also happy to say that all the data was intact. (The partition had not been re-sized, but that's a relatively minor issue now!)