The first step to securing your computer (today we will talk about Windows) is to identify what is at risk. Learning as much as you can about your computer, your network security will make it easier for you to be able topricewhen your system is at risk, and will greatly improve your chances of staying safe. 
Obviously, a computer that does not have access to the Internet, but usesται σαν γραφομηχανή είναι πολύ πιο ασφαλής από έναν υπολογιστή που χρησιμοποιείται στο διαδίκτυο από κοινού από πολλά μέλη της οικογένειας. Ενδεχομένως χρησιμοποιείται για το κατέβασμα αρχείων ή για συμμετοχή σε συνεδρίες διαδικτυακών συζητήσεων κλπ. Ανεξάρτητα από την προβλεπόμενη χρήση, υπάρχουν τρία βασικά βήματα για την ασφάλεια σας: Θα πρέπει να έχετε λογισμικό anti-virus (και να το διατηρείτε ανημερωμένο), ποτέ δεν ανοίγετε αρχεία από πηγές που δεν γνωρίζετε και πάντα το σύστημα σας θα πρέπει να είναι ενημερωμένο.
Beyond that, there are some other precautions that can be taken and will further ensure the security of your computer.
1. Use a firewall. This will give you a different level of protection. You can have a hardware firewall - like the one in your router. There are also a bunch of 3rd-party ones applications software, which you can apply to your operating system. Windows also has a Firewall.
2 Use “difficult” passwords as much as possible access. Using your last name or name of your dog, for your password compromises your security. Much of this information can be easily discovered by hackers. Of course you shouldn't use your children's names or other personal information. A strong password should contain letters, numbers, and special characters (such as ?%*#@) that are not used to describe an actual word. You should also change your password frequently – at least every 30 days.
3. Rename the Admin account. Because the Administrator account is by default, it gives the hacker 50% of the information it needs to access your computer. All he has to do is break the password. To make things more difficult, a good practice is to rename the Administrator account.
4. Create a password for the Guest account. The Guest account is also installed by default and uses a blank password. In general, the account is disabled and is not a threat. However, some hackers use utilities to activate the Guest account. With an empty password, it is very easy to break your system. Set a password for the Guest account, and leave the account off.
