First the specs:

I just got a this hardware, I happened to have a previous issue about 2 weeks ago where after a search using duckduckgo, I would click on a link (which I had opened many times before) and suddenly while browsing that website I'd be be redirected to result page of google.com with part of the address in the search and an error as a result and no way to go back, as if no history, I tried my search again starting from duckduckgo, find the results, click on the link this time i'd be redirected directly to google.com sometines getting only no results and a blank search field or filled with the last half of the address starting with HTTP (if i remember correctly something like this: HTTP//hdmi%output%problem/page_4.html). Even entering the full address of that said website by copy/paste in the address bar would end in "error 404" page. This only happened in Firefox and any search engine, I tried the same search on Internet explorer with various search engines, no problem.
I was sure something was wrong (even though the hardware was a couple of days old at the time), at that time i was running only windows defender, so i recovered the OS and I installed Avast and Spybot right after the recovery was done.
Since then till today no problem. Now I remember a couple of days ago I ticked the "tell sites...tracked" case (which I then remember doing the first time from the get go) and I started having trouble accessing websites sometimes when doing searches from duckduckgo, I figured some sites rejected my request to access them because of the fact i had ticked that case. No problem I'll look for my answers on another website from the result list. But now the redirect is happening again so I figured I'll un-tick the case and, so far no problem.  

Hello, First the specs: - PC: Dell Venue 8 Pro (New) - OS: Windows 8.1 - Firefox Ver.: 33.1.1 - Default search engine: duckduckgo - Current security protection: Avast and Spybot S&D (all up to date) Hello I just got a this hardware, I happened to have a previous issue about 2 weeks ago where after a search using duckduckgo, I would click on a link (which I had opened many times before) and suddenly while browsing that website I'd be be redirected to result page of google.com with part of the address in the search and an error as a result and no way to go back, as if no history, I tried my search again starting from duckduckgo, find the results, click on the link this time i'd be redirected directly to google.com sometines getting only no results and a blank search field or filled with the last half of the address starting with HTTP (if i remember correctly something like this: HTTP//hdmi%output%problem/page_4.html). Even entering the full address of that said website by copy/paste in the address bar would end in "error 404" page. This only happened in Firefox and any search engine, I tried the same search on Internet explorer with various search engines, no problem. I was sure something was wrong (even though the hardware was a couple of days old at the time), at that time i was running only windows defender, so i recovered the OS and I installed Avast and Spybot right after the recovery was done. Since then till today no problem. Now I remember a couple of days ago I ticked the "tell sites...tracked" case (which I then remember doing the first time from the get go) and I started having trouble accessing websites sometimes when doing searches from duckduckgo, I figured some sites rejected my request to access them because of the fact i had ticked that case. No problem I'll look for my answers on another website from the result list. But now the redirect is happening again so I figured I'll un-tick the case and, so far no problem. Is this normal that some websites block/cancel the access because of that feature? why the redirect to google? I don't even use google, besides checking gmail occasionally (1-2 times a week). PS -when I get the Error 404, that is the only thing displayed on the page, no "check you connection" or "the page is unavailable" - as I type this I have in my history (1x) error 404 with the logo from google next to it, again I do not use google, if I try to open it now I get the page I was supposed to see when I had the case ticked. Thank you Nicolas