I extracted it from my .cab files on the Win9x cd, then just copied it in DOS mode (I think it prompts overwrite Y/N?). However, I would suggest before you do this, you make a copy of your current explorer.exe file & maybe your registry, so you can restore if necessary. I can't imagine it causing a problem, but, I always make copies before I do something like this.
The first time it hit me to get a "clean" explorer.exe was after my xfers kept locking up. I got to asking myself, "what is the same here". It hit me that all the xfers used explorer.exe. I believe this is the case whether you xfer by copy/paste, in Windows Explorer, or in My Computer. I reason that all of these use explorer.exe, because that is the one main file that always has to be running in Win9x.
Yeah, it probably won't help....but, it did for me, several times. Actually, this was when I was using W95b.
Also, if you are using W98SE, I believe it has a "file check" or something to check critical files for corruption? I haven't used it, but I think my Dad has. Dunno....just thinking here.
--Randy