I've got windows explorer 7 and XP-Pro, there's absoulutely no popups, as Todd says they both put a stop to popups and protect your computer from most exe viriuse's, i also go to Walmart and purchase the Nortons antivirius for $40.00. i have 2 computers up and running with these's system's and have not had one virius, in over 3 yrs. running. I'm also a programmer, and could fix if something happened, but the bottom line is protect yourself at all times, because one day one of these's popup's will have a virius and it will melt down your hard drive.
Just from experience,
Zip.