Windows 98 and OpenOffice

I suspect the culprits are the interminable updates to Windows 98. It would not shut off by itself. When turned on, scandisk complained of a file with an unknown ending. When on the Internet, I clicked and had to move the mouse slightly before the command would be sent. Bad slowness.

I tried restoring OO to no avail. I uninstalled it and all the problems were resolved. Reinstalled (1.1.3, Brazilian Portuguese version), the problems seem to have returned.

When can I give Windows the final boot? (not boot up, but out)

What do you think?