I seem to have become a victim of google searches going to a spanish type domain 'en' when searching in Chrome and Firefox (not IE) browser search boxes.
searching for 'stackoverflow' lands on:
I have re-installed both, attacked with Kaspersky, Spybot,Combofix and Malwarebytes. Malware bytes found a couple issues in the registry but I think unrelated as this is on 2 pcs.
IE being unaffected might be a red herring as I rarely use it apart from testing.