Virus. Please help

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Hey /g/ can you help?

I have a virus on my pc more so my browsers however its happening to all of them (I mostly use Chrome)

I was downloading adobe photoshop from pirate bay and then the next day this stuff happened, anytime i go onto a website that has and escalation point on it (In the left corner) it causes pop ups (and yes i use ad block) now i do you have google has my default search engine and that's all even when i go into settings and see it says that its my default search engine. But clearly it is not because any browser i use and anything i look up it searches on google then quickly transitions to Yahoo search, like i can see all the results that came up from google but the Yahoo searches just appears. Also this Yahoo search engine says it is secure yet i still get lots of pop ups when im on it.(Not like all of the other secure pages)

I'm not able to download any adblock extensions if i try it just says "Network error" i also tried downloading "chrome_cleanup_tool.exe" (From chrome help) but when i try to download it it says:

"rundll32.exe - Application Error

The application was unable to start correctly (0xc0000005)"

Any help with this?