Try PCHand Screen Capture, it could help u capture anything on the screen. I'm using it and it's easy to use. I think it's pretty good …Hope it could help.
http://www.screen-capture-record.com/
Popup windows could possibly contain viruses that could be activated if clicked on. Some popup windows are activated when a user arrives at a page but some are on a time delay. More nefarious popup windows can flood the available processor memory causing a crash. Clearing a massive number of popup screens that are part of a virus to crash a computer actually trigger more popup windows. To safeguard a computer, consider installing a popup blocker.
Many popup blockers do work, for the most part. Internet browsers that have their own popup blockers keep popups to a minimum. Some unwanted windows do appear from time to time, though.
A spam popup blocker prevents ads from popping up in new windows on a users browser. The spam popup blocker first appeared on the internet scene in the mid 1990's.
Install a popup blocker and other anti adware software on your computer. Your browser probably has a preference you can set that doesn't allow popup windows, either.
Your START MENU and ALL PROGRAMS can be found in Windows 7 or Windows Vista - find and click the icon on lower far left.
Use a third-party pop-up blocker such as Adblocker or Malwarebytes.
adware in the form of a popup
Generally, you can just close popup windows. It's best to enable your browser's popup blocker (I haven't seen a popup in years), as there are very few "useful" popups. There is nothing illegal about the website, but even if there was, you can't be held responsible for something that popped up on it's own.
You can't do that with Windows Movie Maker unless you have the Lightsaber effect downloaded.
Use confirm or alert in javascript code to get a popup
Most butterball turkeys will have a popup button that tells you when they are finished baking. However, it is best to test with a meat thermometer and not just test the popup.
The last patent with his name on it was a three-state button-solution. The button would get rid of "Are you really sure?"-popup windows in Mac OS X.