OK, after wrestling with this "pig" for three days and taking on-board all the excellent suggestions U guys made, I tried one last thing before taking it to my local dealer to get if fixed. I cleared the CMOS and then switched it back on. Win95 then installed without error and I have spent the morning installing software without problem. Next step is to add another hard drive on which to install Linux (Red Hat probably). Thanks for all your help. DW Do you want to signoff PCBUILD or just change to Digest mode - visit our web site: http://nospin.com/pc/pcbuild.html