When you open your browser, do you always get redirected to Smashapps.net? If so, then a browser hijacker is causing these redirects. The browser extension Smash Apps promises to enhance user browsing experience but it is actually a browser hijacker that will attempt to commandeer your homepage and search engine to https://smashapps.net/. Smashapps.net will send you to malicious websites to get money from you or infect your computer further. It may also spam you with unwanted ads and prevent you from changing your settings back.
Smashapps.net redirects is usually installed through bundled software Smash Apps without you knowing. Remove it immediately.