Just read the back posts on hacking. Although your PC may be safe, scammers seem to get your phone number easily.
Having to fill in ,as compulsory in a form, seems to me to be a way in, so don,t do it if possible.
I get regular calls purporting to be from Microsoft/Windows.
Microsoft say ,report unsolicited calls to your provider and if money is involved, call the police.
There are some who will never answer the phone, due to this.