I want to install Bitcoin Core on my computer. Please tell me what I need to know about security, what needs to be done so that no malicious programs spoil my pc and my Bitcoins are not stolen
Thanks in advance!
Better use Electrum wallet, and download it only from official website.
You don't need to run full node and download entire btc blockchain with bitcoin core wallet.
If you can keep it on some offline computer or on usb drive even better