I just got a new computer it has windows vista home premium os . before I could open pps. files but now every time I try to open one up pops ms office for me to register. while it is on my computer I did not order it and do not have the cd for it. I installed a pps viewer I down loaded of the web but cannot get it to work office just keeps popping up . can anyone help me? linda creech PCSOFT maintains many useful files for download visit our download web page at: http://freepctech.com/downloads.shtml