It is better to remove Mysearch123.com without any delay:
Mysearch123.com is designed to distribute its own search engine http://Mysearch123.com/ which is wildly known as browser hijacker and redirect. Once Mysearch123.com gets installed, this hijacker will fail the overall performance of your PC. No matter which browser you use - Internet Explorer, Google Chrome or Mozilla Firefox, the homepage will still be replaced and the search engine will be defaulted to Mysearch123.com without your full consent.
