Dear Igor, I was unable to use the help page as I could not read the security code block at the bottom of the page. Anyhow I am using Windows XP with a brand new graphics card ATI Radeon X1650 Pro. On initiation of a preview or a completed PTE show, my screen looses it's colour "Spyder" calibration & displays a strong blue cast, then after 6 or seven slides have been shown, the pictures either freeze or the graphics card crashes putting my LCD monitor on standby. The only way to get back is to reboot my PC. There are no problems with the early version of PTE 4.48.