System error

I have realized a patch that uses some blocks freeframe as: contour, trautner, applied water or attractor to the effect…
when I open the patch already saved in formality full screen, at times, windows gives an system error .
I use a pc with windows xp professional with sp2, video card nvidia geforce 7300GT 512Mb, Intel Core2 Duo, 1Gb RamDDR2.
what I am able, or I have to change for having more stabilities: video card, operating system, CPU??

thanks to everybody.