The fact that it happens both with IE and with Chrome more or less proves that it are NOT cookies and cached pages, because they are totally independent and different.
Next experiment: try both these browsers in a new Windows account. What happens?
Did you already scan with Malwarebytes' Antimalware and Adwcleaner? It looks more like malware.
No I don't want to delete all my cookies. They are invaluable to my browsing.
But a stupid thing happened recently where all of a sudden everything in my pc that usually took me to my Yahoo forum site started taking me to a 'fake' yahoo site instead.
It took me 2 days to work out it was a fake site because the Yahoo logo is in a purple written font rather than the usual Block letters font with the ! at the end.
It still shows me some of the content but none of the links or buttons are active. All cached pages & cookies are now pointing to this fake site.
I thought I would go through & manually remove all the cookies & cached pages etc for yahoo & tart again. But even when I highlight the favicom object(is that the right terminology?) & right click to delete, it doesn't delete.
How can I redirect to the right site?
I have win7, AVG full security suite which does daily scans & weekly deep scans. I usually use IE but tried google chrome but got same results which is how I worked out it might be the cached pages or cookies because both browsers would rely on same info. (I think? Am I on the right track?)