Capture It Plus Information:

Capture It Plus, or popupalert.exe, is a scareware program from the Rogue.Tech-Support-Scam family that pretends to be screen capture program, but actually is designed to display a fake McAfee security alert that states your computer has a Trojan. This fake alert will state that the Adware.Win32.Look2me.ab Trojan was detected and that you should call the 1-800-245-2579 remote tech support number to receive support. This alert is worded to scare you into thinking your computer has a serious security issue even when you do not. It does this so you will call the listed number, which is for a remote support companies that will try to sell you unnecessary support services or software.

http://www.bleepingcomputer.com/virus-removal/remove-capture-it-plus-fake-mcafee-alert