hey.. this is realy annoying.. whenever i go to cmd through start>run i get the message "16 bit ms dos subsystem 'ntvdm cpu has performed an illegal instruciton" i get two choices, continue and ignore but booth of them close the window. When i open cmd from the system32 folder, it works fine. But when i need to install an application or run something, the same message pops up when it needs to run Dos. Please help me out, its been bugging me for a week and i cant fix it.