http://www.cleanpcsolutions.com/remove-greatsave4u-pop-up-ads/ GreatSave4u pop-up Ads is classified as dangerous adware program, that is specially designed to make money. It comes through visiting illegal websites, playing online games, downloading freeware application and spam or junk email attachments. Once installed, it actually tries to get your concentration by posting huge annoying pop-ups and redirect your searches to various malicious or unsafe websites. It breaks your system security like antivirus and opens backdoor for malicious activity. It has also ability to slowdown your system performance and change registry setting. GreatSave4u pop-up Ads will shows false coupons and other deals available on different websites. So it is recommend to get rid of GreatSave4u pop-up Ads immediately.