my pc restarts over and over when I try to run QNX

I’ve just installed the QNX 6.1 package for Windows and rebooted my machine
trying to boot into QNX…BUT it loads some time, and then accidently
reboots the whole machine…and that over and over again…I thried the “no
dma” mode, I tried “save mode”, but nothing seems to help

My pc is 200MHz Pentium MMX, 256MB ram, 2 x 20GB hdd, S3 ViRGE DX video card