Many PC users have faced the problem as an unrecoverable start page in the browser. Many have repeatedly used antivirus software to fix this problem, since in most cases the sites on the home page are sources of viruses or vulgar advertisements. But no antivirus can cope with this, since it is not a virus, but a replaced shortcut pointing to that site in the final folder. Although this is a virus software business.
A couple of minutes to fix this
Remove all browser shortcuts on the desktop and taskbar.
Create new shortcuts pointing to the browser exe file. You can usually find this file in the destination folder of the browser itself. For example Chrome "C: \ Program Files \ GoogleChrome \ chrome.exe" or Opera "C: \ Program Files \ Opera \ launcher.exe" All problem solved !!!
If this method does not help, then try using an antivirus program or special utilities. In the most extreme cases, restore or reinstall the operating system!