After getting infected with Paulgrenwood.com pop-ups browser hijacker, I feel some change in search results because clicking on any result will taking to unrelated web pages which seems like hub of unwanted ads. after visiting some of such web url, my PC goes slower and sluggish. Then, it is clear that I had some malicious programs in my system. then I scan thru my regular antivirus program and found that my PC is facing problem due to presence of Paulgrenwood.com pop-ups browser hijacker but it is not able to get rid of completely because of its stubborn behavior. Then I go with the manual steps which is describing below. But if your infection is very severe and manual method is not working then go with Paulgrenwood.com pop-ups removal tool which is an automatic solution to safety of PC programs and software.
http://www.pcinfectionremovalguide.net/download-spyhunter