What Is www.alphashoppers.co?
If your browsers’ start page and new tabs have started opening https://www.alphashoppers.co/ext/index.html?partid=gtdvsch&subid=[…] (Alpha Shoppers) page, that is caused by a browser hijacker. A browser hijacker is a piece of software that can change start page and other browser settings to make users visit certain sites regularly. That increases advertising revenue for owners of those sites. A browser hijacker may end up on your computer after you install freeware or run a file downloaded from a questionable source. This step-by-step removal guide will help you to get rid of the browser hijacker and remove www.alphashoppers.co from your browsers.
Upd. Jan 2018: Recently some users reported that their searches from browser’s address bar get them search results on Alphashoppers.co site, while their default search engine is set to Web (Default): chromesearch.club (or chromesearch.win). If that is what happens in your case, then a removal guide for AlphaShoppers Search Redirect will be better suited for you.