here's a tutorial on getting the original windows 98 screensavers like 3d pipes without trusting a random screensaver site

don't worry you won't have to install it in an emulator or anything, that would be insane

step one

download the windows 98 disc image from here at winworld

step two

use 7-zip file manager (or anything else that can open an iso and old windows .cab files) to open the .iso file.

navigate to the win98 folder in the iso and open WIN98_52.CAB

step three

copy the ss[name].scr files to your c:\windows\system32 directory

step four

stylish pipes

Internet Archive has a beautiful collection of screensavers, and several old school screensaver sharing sites (such as Screensavers Planet)are still around.

Anywhere you can find an .scr file you can follow the above. My fave is Electroportis.

oh my god archive.org has a promotional prerelease screensaver for Freddy Got Fingered

and also various versions of After Dark, of flying toasters fame, but. that's not as insane

I'll also toss this out: I vaguely recall that one of the versions of 3D Maze has a bug on modern computers where all the walls, ceilings and floors get rendered with the same texture when they shouldn't be when used on modern versions of Windows. I'm not sure if the Win98 version was guilty of this, but I think the version in either Windows ME or Windows NT4 performs correctly.

That being said, there is one downside to using 3D Maze: it assumes single-screen. Your primary screen will be saved, but your secondary screens will continue displaying the desktop and all its windows as if nothing changed. Non-issue if single-screen is your use case, but multi-monitor setups are getting to be increasingly common these days, so keep it in mind! Supposedly the source code is available in the Windows NT4 SDK (according to Foone Turing), so it may be possible to compile a version that amends this?