malicious

So I accidently ran an app I never meant to download, I got it off my computer but windows is still looking for it every time I load windows. Is there any way I can stop this from happening? This pops up when windows boots: Thanks!

Hi Just today I am seeing various rubbish popping up on my desktop - please see image attached. I run Bitdefender which hasn't detected any issues, is there another tool I should use to remove this or a Windows setting to change? Thanks! Dave