Hurti,
Even though we haven't seen any problems with CVI 5.0.x in Windows XP, we do not officially support this version of CVI in XP. The only version NI officially supports is 6.0 and later (go to http://ni.com/info, and type "winxp" in the info code field).
Are you able to reproduce the blue screen with one of the examples that ship with CVI? Or is this related to your particular project?
Regards,
Azucena