Search Dimension is a browser hijacker that will attempt to commandeer your browser search and homepage. The virus will send you to malicious websites to get money from you or infect your computer further. It may also prevent you from changing your settings back.
Once this browser hijacker, Search Dimension, is installed, your existing Internet browser settings will be changed directing your searches to searchdimension.com. It will also replace your homepage and new tab page with its own. Search Dimension is usually installed through bundled software without you knowing. Remove it immediately.