If you are still young and got no money, that's where you go to, cracked version of Softwares, at least, that's where I started from, and I didn't know anything about hacks and BTC back then, so I have nothing to worry about...
I have to admit, that's how I started using programs, mostly looking for cracks and illegal licenses, but that has changed completely since I started using crypto. While I was using the pirated version of OS and Electrum, and some other pirated software - I have to admit that I did not sleep well, because I was always afraid of a possible hack. Then I decided to buy a hardware wallet, and use only the software I can pay for, but I'm sure it's clean and legal.
Can any of you suggest me a good seller 'that has been voucher already' for me to buy such things from them? Can I buy licences for cheap here? Had never looked marketplace for these stuffs so it may be helpful for me if you have dealt with someone who can be a life savior for me.
Each seller can be judged by their trust score and by someone who is vouched for him, although this may not always be 100% accurate, one should be cautious and preferably use an escrow. You can visit the Digital goods board, use the keywords "antivirus + antimalware" or anything else and get relevant results.
In my opinion the default Windows defender software is more than enough; and I just download the free version of Malwarebytes for the weekly malware scan.
The paid version of Malwarebytes is a far better solution and costs only a few $. Prevention should always be emphasized, because it is better to prevent a computer from becoming infected than to deal with the consequences. I suppose none of us leave the door of our home open when it going outside or overnight, because thieves will notice it and take advantage of the situation. It is the same with unprotected computer, sooner or later something will do damage, sometimes difficult to repair.