hi. i have an old compaq presario 4508 computer. i have a ps/2 mouse connected to it. when i boot, i get a bios error "ps/2 mouse configuration error - device disabled". there is no place i can see in the bios to enable it. any ideas? thanks.

Make sure the cable hasn't come loose.
Try another mouse.

Do yourself a favor BACKUP!
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hi. i've tried a different mouse and same thing. tried a serial mouse and that didn't work either. i have cleared cmos, that didn't help. any other ideas? thanks.

"tried a serial mouse and that didn't work either"

Whatever difficulties you are having with your PS/2 port should not affect a serial port mouse.

In both cases, the port must be enabled in the BIOS, as well as by the Operating System

Check again

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If you can boot into windows go to the control panel- system device -manager delete mouse and reboot.

http://www.computerhope.com/wscreen.htm

.. which will do nothing if the error message is truly being generated by the BIOS.

Looking at one old machine, that option is found under 'Security'

Was this mouse ever working on this machine?

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Does the serial mouse work once you get into 95?

Have you checked the contents of CONFIG.SYS and AUTOEXEC.BAT to see if there is anything there relating to a mouse.

I presume the error message is displaying as you are booting the pc into dos prior to W95.

Good Luck - Keep us posted.

thanks for all the replies. i will try a bit later on. i will post what i find out. thanks again!