XP Home reboots when CD inserted

[gargoyle47 <gjdcatman@xxxxxxxxxxx>]

I have just moved my PC from one room to another at home. Now, when I
insert a CD into the optical drive, my PC reboots without warning and
without displaying any error messages. I have tried using different
CDs, of types CD-R and CD-RW.

Apart from physically relocating my PC (very carefully) I have not
installed any new software or made any configuration changes.
I have performed a full security scan (anti-virus, spyware, port-
probe, etc.) – all clear. I have also performed a System Restore to a
stable date.

The same thing keeps happening.

Any suggestions please?