Getting redirected to the website FastHolidayShopping.com means a browser hijacker is present on your PC. This browser hijacker will attempt to commandeer your browser search and homepage. FastHolidayShopping.com redirects 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.
The browser hijacker FastHolidayShopping.com is usually installed through bundled software without you knowing. Remove it immediately.