Snowbourn (Snowbourn@discussions.microsoft.com) in
20FD50BF-FC3A-41FA-AD6D-CE18D5F0A97B@microsoft.com:

You don't need to be.

You could make a backup of that hard disk before performing "the cleanest of
installs" (or a lesser option).
If this Gateway computer still is functional, then you could backup the
contents of that hard disk to some optical media (DVD, CD) or to an external
hard disk. Or at least merely copy your data files (music, documents) there.
If this Gateway computer isn't itself functional anymore, then you could
remove the hard disk, fit it as an extra in another (desktop) computer that
supports the interface (IDE, SATA, etc.), or in a matching (dimensions,
interface) external case that connects through USB. Then you could backup it
there.

I have done this disk juggling in both ways, even fitting a notebook hard
disk in a desktop computer (using an adapter cable). It isn't surgery, but
you must be comfortable "looking under the hood". And I've just shown a
direction, not written a step by step guide. I haven't addressed the
different ways of backing up.
If you are convinced that I have shown you the way out, but are
uncomfortable to go it yourself, do show my words to somebody whose
experience with computers you trust, and ask him (or her) for assistance.

NOTE: I'm only addressing the possibility of a backup at all. I am not
convinced that you are in such trouble that you need to discard your data.
If your computer doesn't have an on-board sound chip, then there won't be an
option to disable it. There could be many reasons for having no sound, ones
at your disposal (selecting devices and volume), ones beyond your control.
It may be worthwhile to see what you can discover *yourself*. But you may
need to invoke experienced assistance after all.