i purchased new system and i have installed the windows vista on mine system. i have also installed the outlook express on system as well. From last one week i have issue on mine outlook. Yesterday i am trying to take the back up of mine .pst contact files from Outlook but during this time i have got the error: “Ox 80070021 that says that the files are being locked out by another program”. Now i don’t know what to do please anyone can solve this issue and so that i can solve mine issue. These contacts are taken from the I-Phone.