progran crashes

hi all,

i've experienced some program crashes during normal use. or i can say low use, i have only two user and only one, me, connected.
i have vo installed on a pc with winxp home, 512 mb ram and i use currently this pc.
crashes are a big problem because, after them, the program cannot restart and i have to reboot the pc.
if you want take a look at some log file, please let me know.

thank you