Technology

Restore Windows following a driver error or failed update

A brief guide to help you resuscitate your PC in case you are no longer able to start after malicious driver updates.  NOTE:  This guide also applies in the event of an error due to driver installation that is not compatible with your system.  Blue error screen: CRITICAL_SERVICE_FAILED.    If you are in the condition of not being able to …

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How the Windows password works and why when we type a wrong one it takes more time to login

It may have happened that you entered the wrong password on Windows (XP/7/8/10…) and noticed that the computer took longer to retry the input field.  Many will have wondered why when you enter the correct password the PC recognizes it immediately, while it remains in a sort of semi-stall otherwise.   Some may have thought that …

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How to create a safe and easy to remember password

They say that the most used passwords are always the same (example: 123456, password, qwerty, etc. …), or in any case referable to birth dates or memorable moments of someone’s life. Well, using public characters or real places is not a good idea anyway: in fact there are some software (like John the Ripper) that are able to use huge dictionaries, …

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What are DNS, how to configure and protect DNS on Windows

DNS stands for Domain Name System, it is the protocol used globally for domain name translations. What does it mean?  When we type in the name of a website (e.g. spaceclick.com) our computer sends a DNS request to an appropriate server to translate this name into an IP address (e.g. 105.0.0.155). And then it connects to that IP address …

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Phishing brought to extreme levels exploiting punycode – How it works, how it to prevent and be sure of websites through SSL

Punycode is an encoding system that serves to represent a sequence of unicode characters via an ASCII character sequence, to make it possible to use these sequences in domain names, without having to modify existing infrastructure and standards.  In this way you can manage internationalized domain names (IDNA) by adding the characters ‘xn–‘ to the beginning of the punycode string.  For example, by entering xn–google.com as address, we …

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How to change Ubuntu resolution in VirtualBox

If you have installed Ubuntu Linux in a virtual machine on VirtualBox you will surely realize that by default its resolution is set to 640×480, very poor for any type of use.  You will have also noticed that going on the screen settings it is not possible to change this resolution from the dropdown.      To change the displayed resolution …

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Public IP address and DDNS: what it is, how to check and set it to reach devices in LAN from WAN

A computer or any device, when connected to a network (LAN), is identified by an IP address assigned by the router.  This address is usually in the form 192.168.X.Y and it is released by the router’s DHCP to identify the various devices connected to it.   However, since the router itself is connected to the Internet …

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Tutorial RaspberryPi: models – setup – first boot – configuration in a nutshell

A quick guide to the world’s cheapest and best-known Linux-ARM platform  Models – Connections – Setup – Installation – Booting – Configuration commands – Linux commands – Tricks  Introduction  What is Raspberry Pi Raspberry Pi was conceived from the idea of creating a low-cost computer.  In particular, a card that is able to run a linux distribution with …

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