is it easy to be hacked today?

Easy no, but if he is very good with coding yes he can pop right in. I had a few friends I played games with over the years who could pop in and out of my system like I had no firewall or anything else. If he's on their level you can't stop him with anything off the shelf.

How easy or hard it is will depend less upon the skills of the hacker than it does on the skills / knowledge of the targeted PC Owner. Awareness of what you are doing and knowledge of what not to do are the 1st steps. Using a password that is easy for you to remember is one that is also easy to guess (i.e birthday). Using AV / malware protection / detection that is free puts you more at risk than one that is not.

Here for example, we see that Windows defender caught only 5/6 zero day malware attacks in June 1015 ... that means 1 outta 6 got thru ... and 1 outta 9 widespread and prevalent malware attacks went undetected.

https/www.av-test.org/en/antivirus/home-windows/windows-8/june-2015/microsoft-windows-defender-4.7-152347/

In the latest test they did better detecting 96.9 / 98.7 % and 99.6 % / 98.6% which is obviously much better but like a roof that keeps out 98-99% of the rain, still unacceptable in an age when other products stop 100%.

https/www.av-test.org/en/antivirus/home-windows/windows-8/december-2016/kaspersky-lab-internet-security-2017-164857/

Well, it's not about being hacked or not. It's about eliminating the risks of it. You don't have to click on strange links to get infected. You can have no AV installed and just be connected to the internet and somehow you will get some kind of adware. I've been building computers for years and sometimes after installing windows I wouldn't install an AV straight away resulting in adware within 30 minutes of being online. This usually happened with windows 7 but the possibilities are still there. Adware is a gateway to being hacked. it all starts with something small which then leads to malware and then a key logger being installed which then leads to the key logger reporting back to the hacker with your Facebook, twitter, bank details, and everything else you've done on your PC. which then can lead to the hacker finding your email address and targeting you for a RAT (Remote Access Trojan) which then allows the hacker to view your webcam, look at what you do, see your girlfriend when you Skype. he then thinks she's pretty, targets her for a RAT. views her webcam and takes snaps of her while she's dressing. shares those images online and all hell breaks lose. you lose your girlfriend, you life becomes miserable. you die alone. All because you thought you might be okay without Antivirus.

But yeah, Install an AV dude.

Your computer enthusiasts is unfortunately very incorrect. I have done such attacks before and have seen them being done before. A Remote Access Trojan and encrypting viruses into images or other files has been done and can be done and is generally much harder for AV programs to detect. Although Avast has been found to detect the signatures of most of these. I'm studying Cyber Security and have worked in the IT field for over 9 years. I can promise you that this is all real world stuff because i have done it myself.

Trojan remover will find it and remove it. If it were a trojan horse.

It'll probably do a better job than most AV programs. Since it'll also remove the entries for whatever from scheduled tasks and the registry. Which I doubt most AV programs can do

Then reset whatever back to its default settings

As I said before. Avast would be my recommended Anti-Virus software i would also recommend using something like "Key Scrambler" to protect yourself from keyloggers. I would also use two factor authentication wherever possible to prevent data from being lost or stolen if someone does manage to gack anything.

Yes. It will scramble all keyboard strokes entered. So the keylogger will receive random characters rather than what you actually typed. It's a very simple but powerful software.