hi all, i want to run my pc in guest mode (and not in administrator mode) so that no virus, trojan, malware should be able to infect my pc by INSTALLing itself. i don't know how to set group policies etc which will prevent ANY program installations. that means no software installation under guest mode. Permission/logon from administrator should be needed (like they do in college labs/companies) to prevent/restrict unauthorised software installations. please elaborate the method to do this also suggest a suitable article whish deals with this issue.