istart.webssearches.com/ is a internet browser hijacker which makes your browser's home page to http://istart.webssearches.com/ and default search engine to www.websearches.com. This malware also asks permission to collect your browsing details too.
This malware is getting installed on your computer via installation of freewares downloaded from the internet. Do not download and install free software from unauthorized websites and don't click next buttons without reading what permissions they are asking and Always use custom installation while installing software and install add-ons needed.
How to Remove istart.webssearches.com/
First you need to remove all unwanted software from your PC.
Go to Start -> Run ( or win+R) -> <type> appwiz.cpl
All programs installed on your computer will be listed and you can select which program needs to uninstall.