Ms knowledge base:
<A HREF="http://support.microsoft.com/default.aspx?kbid=130802" target="_new">General Information on STOP 0x0000000A</A>
<A HREF="http://support.microsoft.com/?kbid=165863" target="_new">Microsoft Knowledge Base Article - 165863 </A>
<A HREF="http://support.microsoft.com/?kbid=314063" target="_new">Troubleshooting a Stop 0x0000000A Error in Windows XP</A>
<A HREF="http://support.microsoft.com/?kbid=183169" target="_new">Possible Resolutions to STOP 0x0A, 0x01E, and 0x50 Errors</A>
This error message usually means that a device driver is trying to access invalid memory areas. In other words: some buggy device driver. Sometimes you can solve it by rearranging your PCI cards (therewith reassigning IRQs etc, and so reinstalling the drivers in another combination of resources), sometimes by updating your device drivers.
Or the RAM is faulty, or if you're overclocking too much:
<A HREF="http://support.microsoft.com/?kbid=271955" target="_new">STOP 0x4E, STOP 0x1A, STOP 0x50, and STOP 0xA Errors Occur When You Try to Start the Computer</A>
Another source: If you installed Win2k or XP next to another windows installation (on the same partition)
<A HREF="http://support.microsoft.com/default.aspx?scid=kb;en-us;227301" target="_new">STOP: 0x0000000A When You Dual Boot with Windows NT 4.0 on the Same Partition</A>
Another source: Roxio Easy CD Creator <A HREF="http://support.microsoft.com/default.aspx?scid=kb;en-us;311466" target="_new">Computer Automatically Restarts After You Upgrade to Windows XP</A>