The only available registries would be the ones that show when you do the scanreg/restore. You might also try scanreg/fix and enter to see if that helps.
You might check this recent thread:
http://www.computing.net/windows95/wwwboard/forum/166287.html
where uninstalling internet explorer seemed to fix that problem (although the poster later indicated heat may have been the original cause). There should also be an option to repair IE in add/remove programs.
You can get into safe mode by tapping F8 after starting the computer but before the OS starts to load. A menu should come up and you'd choose 'safe mode'. Try that and see if you can get to the safe mode desktop.
If you can get to safe mode you might try updating oleaut32.dll. This site has some links to updates. Those links are to software updates and not just the oleaut32.dll file. Apparently there is no update for just that file.
I downloaded and ran the dcon98.exe update in safe mode on my computer and it did OK. I already had a newer version of oleaut32.dll on my computer and that installation didn't replace it (probably because the dcon version wasn't newer). Of the 2 vbrun downloads listed there the sp5 version has the newest oleaut32.dll.
If you can't get to safe mode then maybe explorer.exe is corrupted. I can email that file to you if you let me know what version of 98 you have.