Have you ever downloaded and run software that exploited your Bitcoin wallet? What software was it and how much Bitcoin have you lost?
Do not post URLs please, just write your experience ))
When I was young, I downloaded a "Steam account cracker", which of course was a nasty trojan and not in the good meaning. Fortunately, I haven't lost Bitcoin from the case. Maybe because I didn't have any that time

But my system behaved very strange and after virus removal, I had to change all my passwords.
I haven't experienced that situation where your device got infected by malware and lost a certain amount of bitcoin, I am very careful of what I am going to install on my PC and even on my mobile phone the best way to prevent this things to happen is to avoid downloading and installing a software from untrusted sources and avoid using other devices when you are going to check your web wallets or any accounts that's related to your finances .