Some negative aspects of the internet can be easily avoided by simple mnemonics.

Viruses and malwares – You must have anti-virus software and a firewall installed on the computer. If you cannot be completely sure who publishes particular software, do not install it.

Password protection – A good password includes upper- and lower-case letters, numbers or characters. Do not use any of your identifiers in the passwords. Change passwords from time to time.

Never hand out passwords, credit card information or personal information by email.

If you come across an unbelievably great offer on the internet, such as a sudden inheritance, do not believe it.

Take backups of all the files on your computer. For this, preferably use both an external hard drive and a cloud service.