Jim Dirksen wrote:
> I'm upgrading from an AMD Athlon 1.0GHz processor to a Intel Pentium
> 4 1.8MHz and motherboard. I would like to run my original OS configuration.
> Do I need to remove some system devices in Device Manager to allow Windows
> 98 to load properly the first time and config to my new motherboard and
> processor? I known I would have to remove these just before I shut down the
> last time, correct?

The following is from a post on another list about motherboard/cpu swap
in Win 9x. The instructions for Win NT/2k/XP may differ slightly.

> > I've built several computers from scratch, but I've never done a mobo/cpu
> > upgrade to a system that already had Win95 operational on it. I know that
> > you can't just install the new mobo/cpu combo and then fire it back up
> > without having Win95 blow a gasket or two, but I'm not exactly sure what
> > the proper procedure would be.
>
> Actually you can just swap the mobo and/or cpu and fire up Win9X and it should
> re-detect everything and work fine.  However this will leave a lot of garbage
> in your registry and the more garbage left behind the more chance for a
> problem later on.  Sometimes I do it this way just to make sure the HW is
> going to work and that all needed drivers can be found.   However even if I do
> this I follow up with a complete removal of all hardware and allow Win9X to
> re-detect it fresh.  See below for comments on how I suggest to do it.
>
> > At a guess, I would say that it would go something like this:
> >
> > Before changing out the hardware, go into Device Manager and remove just
> > about everything(?); turn off the machine and do the hardware swap; restart
> > with only the video card, floppy, CDROM and HDD attached; pray a little;
> > hope Win95 can figure out what's going on and detect the new "devices" on
> > the mobo; set up video; reinstall and redetect sound cards, NICs, or
> > whatever, one at a time. Pray a little more. Maybe have an operational
> > system without doing a format and reinstall?
> >
> > Is this more or less correct?
>
> What you write above it just about right.  A few suggestions that I have so
> you can end up with as clean a system (and registry) as possible follow.
>
> First I suggest that before swapping the mobo that you start up in SAFE mode
> and delete EVERYTHING that shows up in device manager.  Using safe mode may
> cause devices to show up that will not show up in normal mode (especially if
> you did a "trial" startup with the new hardware before deleting the old).
> Additionally when you delete your mouse (or com ports if a serial mouse) in
> Safe mode the mouse will continue to work, but if deleted in normal mode many
> times it will stop working as soon as you delete it.  Delete your HD, Floppy
> and CD drives BEFORE you delete the controllers.  If you have SCSI then delete
> the devices before the controller also.  If controller cards are deleted
> before devices, there is a good chance that the device(s) will disappear from
> the Device Manager display also and you will not be able to delete them and
> you will still end up with junk in the registry.  Once you delete everything
> from device manager use regedit.exe and navigate to HKEY_LOCAL_MACHINE\Enum
> and delete this entire Key (which will also delete all its subkeys).  Some
> people will tell you that all you need to do is delete this key and not bother
> using Device Manager.  If you do this, it will delete everything as far as
> seeing it in device manager goes but will still leave a lot a un-necessary
> registry keys behind in other registry keys associated with the devices.  You
> can also navigate to
> HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class and delete any keys
> that are "category" keys such as CDROM, DiskDrive, FDC, HDC, Keyboard, Modem,
> Media, System, etc.  Basically you can delete just about all the keys that
> have a + sign to their left and have subkeys with names like 0000, 0001, 0002,
> etc.  Such subkeys will only exist if somewhere along the way hardware was
> re-dected or not completely removed.  Have such keys left over after deleting
> everything using device manager is not uncommon.   Do not delete the Printers
> key unless you deleted your printers first (and there is no need to do that
> for a mobo swap).  The reason for cleaning out these registry keys is that
> sometimes even if you do delete everything via Device Manager, due to past
> re-detection of hardware by Win9X, junk (un-used entries) gets left behind in
> these keys also, so you might as well clean them out.
>
> So to do the cleanest job, first delete everything in device manager, then
> delete registry keys.
>
> After the hardware swap, reboot and allow Win9X to re-detect everything and
> ALLOW it to reboot EVERY times it asks.  DO NOT answer no, thinking that you
> can just allow Win9X to continue detecting hardware and do only one re-boot at
> the end.  This is because in many cases Win9X can not properly detect some
> devices until other devices have been properly installed (IE: it can't
> properly detect drives until the controllers have been installed).

Sorry for my lack of originality, but this poster, (Roy), said it much better
than I ever could.
Larry Hooper

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