| Whenever I start to play a scenario my computer restarts
| itself.When returns to Windows XP is says there is a
| serious error
Your system is most likely restarting as a result of a STOP error.
To stop this behavior go to Control Panel / System / Advanced /
Click the Startup and Recovery Settings button / Uncheck the box
labelled "Automatically restart" under the System Failure section.
If the error indicates a file name that begins with ati, or nv (nVidia)
the most likely solution would be to install the latest drivers using
the instructions at: http://mvps.org/nibblesnbits/Video.html#drivers