Sorry, but this is the first one for us. Just double-checked, and it doesn't looks like you're in any of our databases.The only thing I can suggest to check your browser and change your default startup page.

@Matt
Looks like i've solved my problem, i've uninstalled 3 recent programs i had installed in last 3 days: Etcher, win32diskimager, SD memory card formater. And it stopped. I am 100% sure i've untagged all standard "adware" options during my installation, but i guess something went trough. Am i correct to assume you guys are affiliated with one of those companies since uninstalling those fixed it?

No, this is the first time I'm hearing about these applications.

Well... guess it will remain secret for both of us. At least it got solved even if i do not know exact cause of it.