Press F8 during Win95 initialization. You'll have a menu on screen. Choose Logged. After that, look into c:\bootlog.txt. Sometimes you can find usefull info there.

Vlad

>Out of the clear blue one morning I go to bootup and I get this error message (after the win95 logo and, it seems, after the config.sys and
> autoexec.bat):
>
> While Initializing device IOS:
> Windows Protection Error. You must restart your computer.
>
> By going into the "Step by step..." mode I see that the problem seems to be comming from the io.sys file.
>
> I can get into Win95 via Safe Mode but, of course, you can't really do anything in Safe Mode.
>
> I found out by accident that if I bootup in "Command prompt only" mode and then from the C:> prompt enter "WIN", I can get into Win95
> without problems and that all programs still seem to run fine.
>
> My question is: Although this work around works, it makes me nervous to have such a dire sounding error message show up so:
>
> What do you think is causing the problem and How can I fix it.
>
> Any help would be much appreciated.
>
> Oh yea, I also have Win NT 4.0 installed on another drive and it boots up fine.
>
> Ed