If you have a PWS icon, as described above, you can open the Personal Web Manager by double-clicking on the icon or right-clicking on it and selecting Properties. If you are running MS PWS 4.0 or later, a window should open similar to this one:
If you click on the Advanced button in the lower left corner, a window similar to this will open:
If you click on the Help menu at the top of this windows and then select About Personal Web Server, you will see a window similar to this one:
This is the window that will be displayed if you are running the MS PWS version which installs from the Win 98 and/or Win98SE CD-ROMs. Note that it says Windows 98 in the second line.
I don't currently have any earlier versions of the MS PWS loaded on any of my computers, thus can't show the windows from earlier versions.