While i Know and use Darren Stone's WinXScreensaver, it doesn't have BSOD and Webcollage and is not up-to Date (Major Version number at least)
I Know about Sysinternals' Bluescreen but I Want Mac, Amiga, Linux and Windows Error screens. I have tried WinLock but It has a Trojan horse. and so on...

JWZ Hates Windows with a passion so no official support for windows

How About We port Xscreensaver to Windows (XP And Vista)?
OpenGL is recommended as a main version but a DirectX spin-off is needed for Intel Integrated Graphics Users... like me!