It also crashes with the following error messages:

C:\PROGRAM FILES\COMMON FILES\MICROSOFT SHARED\MSINFO\MSINFO32.EXE caused an "Access Violation" fault in module MSINFO32.EXE
at 0167:0040639B.

and

C:\PROGRAM FILES\COMMON FILES\MICROSOFT SHARED\MSINFO\MSINFO32.EXE caused an "Access Violation" fault in module MFC40.DLL
at 0167:7B9812B6.
(when trying to export the info to a file)

sfc.exe didn't fix anything.

I don't run Intellipoint software--which I know causes msinfo probs.

Any way to repair or reinstall whatever's missing?

You need Msinfo32.exe in the Windows folder and Msinfo.inf in the
C:\WINDOWS\INF folder. if you enter Msinfo32 from Start > Run and
you are missing a display try this:
The following worked for me, credit to mbowdoin.
Copy/paste each line one at a time.
I put an * in each command where there is a space, remove the * and
insert a space before running them. 4 in each line. Paste them into
notepad to remove the * asterisks then copy/paste.
You may need to put in the W98 CD.
Then, run the following 4 commands in the Start/run box (each item
should be entered as one RUN command):
The 4 lines may wrap so get it all.
rundll.exe*setupx.dll,InstallHinfSection*Msinfo.reg*64*C:\WINDOWS\INF\msinfo.inf
rundll.exe*setupx.dll,InstallHinfSection*Msinfo2.reg*64*C:\WINDOWS\INF\msinfo.inf
rundll.exe*setupx.dll,InstallHinfSection*CDM.base*64*C:\WINDOWS\INF\msinfo.inf
rundll.exe*setupx.dll,InstallHinfSection*Sigver.Base*64*C:\WINDOWS\INF\msinfo.inf

Reboot then try Msinfo32 from Start > Run
If no help you may need to extract new Msinfo32.exe and Msinfo.inf
files. One or both may be corrupt. Then run the commands.

---------------------------------------

It worked perfectly. My msinfo32.exe file hadn't been corrupted. Extracting it from the CD wasn't a fix. Msinfo.inf is not on the CD to extract. My msinfo.ini file is totally blank (before and after the fix).. don't know what that means.