I updated to Mozilla Firefox 35.0.1 (x86 en-US) on Jan. 27, 2015 after which a browser hijacker called istart123 infected my computer. Did this pup come with your update? I have tried removing it through the uninstall option in my Windows 8, and using the search option and endeavoring to delete it once the files were identified, as well as following various directions for removing addons to your browser and I have tried using Malewarebytes to remove it- nothing works. I am currently following numerous directions supplied via an internet search and I'm am trying another anti malware program. I also followed all the directions from my anti virus program Webroot- so far nothing works. Any suggestions?