How dangerous are viruses on the PC?

Ha
8

I bought a laptop (used like new)

2.7 GHz i5 data and 8 GB of RAM (just a by-the-box).

Lately, I'm downloading a lot of programs I need, and I'm in danger of catching malware.

1 and 2 My questions would be: how do I realize that I have a virus on it and I'm about to, and more importantly how dangerous is it?

3. Does Windows 10 have an integrated antivirus?

4. In case of infection, would removal of the virus eliminate the problem?

I would like to thank you for answering all the questions and enlightning me.

po

And 2 .: That depends on the virus. Some want to destroy the PC, one would notice, others only want to intercept data that you notice rather less

3.Windows 10 has a built-in virus protection, which is now also very good, so you do not need another. Of course you can, but if you go for current tests, the Windows Defender can beat problems with other virus protectors, such as Avira, Avast, etc

4.Yes and no. In principle, the problem is eliminated when the virus is gone. However, there are viruses that load even more viruses, so that you have a virus but then you have other viruses

Bo

Depends on the type of malware, sometimes your system is hijacked to be used in a bot net (in which case you would not notice anything until the computer is used, you hardly have any capacity left), it may be yours Data, passwords etc. Can be read eg With a keylogger, you would not notice, or you catch some ransomware that encrypts and blackmail your data, there are also viruses that actually have no practical use and just destroy your software, in which case your computer will eventually go easy not anymore. There are so many different viruses and malware as there are programs…
Depends on the malware and how confidential the data is on your computer.
Yes, the Defender. It is a good basic protection, but offers no additional services such as protection against Phisingseiten u.ä.
No, actually an antivirus program only serves to prevent viruses or to inform you, should this not be successful. Once a corrupted system is no longer trustworthy (how do you know, for example, that the malware did not infect your virus scanner and camouflage itself, or even in the boot manager and simply re-loaded at the next boot?) And must be completely rewritten, inclusive boot partition.

Sw

It depends not only on how many programs you download but on which website and which program you download. If you download only from Chip.de, then there should be no viruses on it. Darknet site with illegal software can be dangerous.

I think the worst thing that can kill viruses is to completely destroy Windows or destroy the whole harddisk partition, but that leads to data loss, or that the virus can also encrypt your data so that you can normally only decrypt data if you have Trojans Pay money. But fortunately there are some trick possibilities how to decrypt the data anyway without payment. I had never had such viruses before. The only thing I got for viruses at that time is spyware, where I keep getting an error message.

So to really protect against viruses, you'd better only download programs from trusted websites (like Chip.de, PC World etc…). And, of course, avoid going to unknown dark websites and cracking software Download + Run. Especially synonymous with self-programmed programs of users that you do not know, you should start in no case in the main system, because you never know what the user has everything programmed on it, and yes at worst, such self-made programs can read your passwords from registered Accaounts in your PC and so that the user can hack into your Accaount. That's why I recommend using virtual machine to test, and there not register a single Accaounts.

Sw

And 5. There are also viruses that read the whole account with passwords and at worst, owners can hack in there.

Ha

My mouse moves on its own and my PC has suddenly slowed down what's going on?

Sw

When you turn off Internet, does the mouse still move on its own?

Ha

That came from the external mouse has done but the hanging with the hang is still from time to time

Sw

The hang with the hang necessarily not necessarily because of viruses, but that can put also because of weak hardware.