It can easily install a keylogger on your hard drive (C: usually), it can be done very quickly and in a very short time on your computer. This means that all your passwords that you enter for emails, Facebook, Skype and whatever else you can think of, he receives them on your first login and can log in and dig into your personal profiles and information. Not to mention that there are screen sharing programs that can control your mouse and the whole computer in real time from his. There are also viruses that set the temperature of the processor, video card at higher speeds and can burn them in 10-20 minutes. But that's hardly it, he'd rather have access to your personal information if he did anything at all. Years ago I decided to hack an email (to a woman of course :), downloaded the virus and hacked myself. After half an hour the computer started behaving super weird (the hacker woke up or started), I turned on that something was not ok, I just updated the antivirus and spyware / malware, restarted, manually removed the internet cable. After the restart, I run the scans more calmly, with the i-net cable removed. Because I got bored of waiting when I opened D: I look at the top I got a directory "6e ti e * a maikata" without censorship :))) And in the directory were some 3 files that I have never seen and known as an abbreviation . It is very clear that I did not open them, directly in the Recycle bin, and from there the delta. If you have doubts and in the future it is better to bring to format the C: disk and reinstall Windows, most likely it will be there. On average it costs about 25-30 BGN. If it is a type of keylogger program, you have no problem, no matter how much you change your passwords on Facebook, Skype, etc.
1 sovwmn answered
It is very relative. Depends 1. Whether there is direct access to the PC. 2. Is there a possibility for a remote one .... Just from what you wrote can not be understood. Is it a home computer, is it business, is it online? What is a network if it is a network? Relative. Give a little more info to help you.