Fuzzy wrote:
Unplug your internet.
Restart your computer in save mode and scan.
Not sure a "save" mode exists, but definitely unplug the connection to the internet and start scanning the computer ALL OVER for all types or harmful objects, cookies, malware, spyware, adware, viruses, etc. Keep scanning until nothing comes up, helps to use multiple scanners when one is not permanently active and one to run on demand.
Depending on your internet browser, I would set about changing the home page or checking it out. Something like msn.co.uk as a homepage is good, or google.co.uk, or whatever.
I once created a registry file that can restore or change the homepage to whatever I want just by loading the file

and that was low-tech.
Look for software that shouldn't be installed