only started yesterday. every time i press enter instead of bringing up the website i have clicked on, i get something totally different like a sales website for sportswear. Mostly it is a download for something called reimage repair which claims to deal with problems with windows 10.
I agree re Malwarebytes and assuming it's a PC (as opposed to a Mac) make sure its built in security software (eg. Microsoft Security Essentials) is up to date then run a FULL scan.