If you are building a secure computer, then the best approach is to never connect it to the internet. If the operating system on this computer is Windows, then you will have to activate it before you will be able to use it. This article explains how you can activate it by phone.

You may have heard of "Heartbleed", a flaw in OpenSSL that could allow the theft of data normally protected by SSL/TLS encryption.

It is possible to scan for the presence of this vulnerability using different methods.
This page explains how you can scan for it from a Windows machine using nmap.

How to enable the Windows Firewall, even though Domain Policies are prohibiting you from enabling it...

How to use SubInAcl.exe?

A list of tools which are available on any Windows operating system.

General

• date /t: shows the current date
• time /t: shows the current time

Windows memory

• mem /P: Displays status of programs currently loaded in memory.
• mem /D: Displays status of programs, internal drivers, and other information.
• mem /C: Classifies programs by memory usage. Lists the size of programs, provides a summary of memory in use, and lists largest memory block available.