Pop-up Blocker is turned on in Internet Explorer by default. To turn it off or to turn it on again if you've already turned it off, follow these steps:
  • Open Internet Explorer by clicking the Start button , and then clicking Internet Explorer.
  • Click the Tools button, and then click Pop-up Blocker.
  • Do one of the following:

    • To turn off Pop-up Blocker, click Turn Off Pop-up Blocker.
    • To turn on Pop-up Blocker, click Turn On Pop-up Blocker.