MySearchResults.com is the homepage that is placed by a malicious browser plugin called DefaultTab from Search Results LLC. This malicious plugin, addon or BHO (Browser Helper Object) is offered during the installation process of downloaded content such as download managers or fake flash players, for example VLC media player. The Search Results LLC malicious extension is offered and enabled by default during the installation. The browsers homepage and search engine are replaced with mysearchresults.com once you agreed upon installation the Default Tab extension.
It is advised to always read the Terms and Agreements before installing software on your computer. Do never click too fast thru the installation process [Next] button of software as you will agree to software you might not want to install. If the installer offers a Advanced or Custom option button, click it to find out if there is any other malicious software offered and installed during the installation process.