Srchpx.xyz is a fake search engine promoted by the browser hijacker or PUA (potentially unwanted application) SApp+. The browser hijacker will attempt to commandeer your browser search and redirect you to https://srchpx.xyz/results.php?wd=[search-query] when performing search queries. It will then send you to malicious websites to get money from you or infect your computer further. It will also spam you with ads and may prevent you from changing your settings back.
Srchpx.xyz is usually installed through bundled software without you knowing. Remove it immediately.