I NEED HELP [WINDOWS] / [CHROME]

Hello there MPGH I really hope everyone Having a Great day.

So Recently I Downloaded Some Random stuff to get a Windows 10 Product Key for free It worked

But I got some Viruses or What Its called Anyways When i search in my Google Sometimes i get Random popups
Or Another Searching Website Or Even If i don't even Touch the Site just let it open Sometimes It just popups more Websites

And i whould be so freaking happy If anyone Know how to fix it Simple and Easy It whould be really helpful i don't got so much money
But We can prob make a deal out of it anyways

I just need this Gone Please help me

Contact me on Dicord - Jonte#7036

Or Contact me On Skype - nn5tte

Format c: ?

Just run windows defender?

Kj I will try to run Windows defender Now Hope it will work Thanks. And i'm Using Windows 10 Smirnoff If That what it means with Format

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The windows defender Did not solve it sadly