When trying to create a system restore point prior to installing new software on my computer (Sony VGN-FW290 running on Windows Vista 64-bit home premium), I get a screen message asking for my permission to run 'SystemPropertiesProtextion.exe' from an 'unidentified publisher' asking whethter or not I should allow that program. I have tried to find that file using the windows search engine, without success. Should I allow the program to run?? If it is a Microsoft or Sony program, why does it show as an unidentified publisher? Is there a way to tell whether a file/program is genuinely needed to perform an operation or a 'nasty' just waiting to infect my computer. PS: I have done a complete virus scan (404 000 files) using ESET and no potential threats were discovered. Ignorance is DEFINITELY not bliss!!