Hopefully someone will know what is causing this issue. We are using CATIA V5 R17 on windows 7 OS platform. The PCs we use are new and are work stations built specifically to run CATIA. The I'm having with mine is that quite often I get this weird screen crash and have to force the PC to shut down and reboot. The screen suddenly displays vertical lines and CATIA is gone. I'd post a image of it here but I guess this forum doesn't allow that. Has anyone had this problem? None of the other CAD Designers in my group have reported this issue that I know of.