Sadly, Microsoft does not offer a way to fix most errors. We have to hunt them down and hope we have a cure. The area of the OS repair tools being removed in Windows ME (note SFC) made it an unpopular and short lived OS version. So where does that leave us?
If we damage the OS with some tool, repair can be to start over.
Let me be blunt. IE 5.5 is an accident scene. The CODE LEAK a few months ago opened the door with documented exploits and Microsoft responded by removing IE 5.5 from further patches. In Microsoft's eye, IE 5.5 (and prior) is no more. There are no cures to the issues so in no uncertain words, any user that uses an exploitable version of IE has to live with it. I can't help those.
In regards to "I can't get the IE6.0 SP1 to complete downloading, and think it is because I have OE6 for my e-mail which runs fine, and still have IE5.5 which also runs fine.Could this be the problem?" I think you have to backup your favorites, email and more then consider the big fix that I have walked many through here. For some, it's too much and they can't do the work. Which I understand, but again, the user that can't do this must find their own solution or consider just living with the issue.
1. Since it's just the help screen? Then why fix it?
2. If you want to backup OLEXP, type OLEXP BACKUP into http://www.google.com and you'll get the articles.
3. If you have the time to reinstall IE, then here's the discussion where we did such.
There are other such threads here, but I'll leave it to you to search them out.
4. If you continue to use IE as your primary web browser and leave the PREVIEW enabled in any version of Outlook, then you troubles should continue. I will not mince words when I advise people to move out of the line of fire between malware writers and Microsoft. Try Firebird or Mozilla.
Best of luck, and my apologies if this sounds harsh or terse. I really want people to have a good PC experience.