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A Windows 11 desktop.
Windows 10
What Is the NTUSER.DAT File in Windows?

Hidden in every user profile is a file named NTUSER.

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An illustration featuring the Linux mascot, Tux, with the text 'Immutable Linux Distributions'
Features
What Is an Immutable Linux Distro, and Should You Use One?

Linux but more secure.

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A PDF file being printed on Windows 11.
Files
What Is a PDF File (and How Do I Open One)?

Stop sending people DOCX files.

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A motherboard visible in a computer case.
Hardware
What Is UEFI, and How Is It Different from BIOS?

BIOS is dead, long live UEFI.

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A sim tray.
Cellular Carriers
How to Protect Yourself From SIM-Swapping Attacks

Even the best-laid security plans can go awry if you fall victim to a SIM-swapping attack. Here's how to protect yourself.

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Google Chrome browser open on an iPad.
Features
Browser Extensions Are a Privacy Nightmare

Browser extensions are much more dangerous than most people realize.

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User Account page in the Control Panel on Windows 10.
Windows
Why You Shouldn't Disable User Account Control (UAC) in Windows

The one time you do want a popup.

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A physical lock.
Web
What Is Encryption, and How Does It Work?

You've probably seen the term "encryption" used around the internet.

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Task Manager on Windows 10.
Windows 10
What Is the Service Host Process (svchost.exe) and Why Are So Many Running?

Why are there so many?

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Texting on an iPhone.
iPhone & iPad
Why Are Some iMessages Green and Some Blue on My iPhone?

It ain't easy being green.

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An eReader.
Kindle
What Is an EPUB File (and How Do I Open One)?

Here's how to crack that virtual book open.

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An eBook.
eReader
What Is a MOBI File (and How Do I Open One)?

It's an older file format, but it checks out.

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Laptop, smart watch, smartphone, and tablet charging with the Mophie Powerstation Pro AC.
Hardware
How Bad Are Power Outages for My Gadgets?

More power, more problems

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Rhino Linux running on a laptop
Linux
What Is Rhino Linux, and Should You Use It?

Start rolling with Rhino Linux

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The Windows 11 Start Menu with a few apps that use XML based files, like Word and Excel.
Files
What Is An XML File (And How Do I Open One)?

HTML's more exciting cousin.

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Event Viewer on Windows 11.
Windows 10
What Is the WMI Provider Host (WmiPrvSE.exe), and Why Is It Using So Much CPU?

The WMI Provider Host process is an important part of Windows, and often runs in the background.

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The Windows 11 Start Menu.
Files
What Is A 7Z File (And How Do I Open One)?

Like a ZIP, but not quite.

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A Windows 11 desktop with lots of composited elements.
Windows 11
What Is Desktop Window Manager (dwm.exe) and Why Is It Running?

You shouldn't need 32 gigs of RAM to run the Desktop Window Manager.

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System32 folder on WIndows.
Windows 10
What is the System32 Directory? (and Why You Shouldn't Delete It)

Deleting System32 will not speed up your PC.

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The back of a router.
Cloud & Internet
What Is DHCP (Dynamic Host Configuration Protocol)?

Ever wonder how your devices get an IP automatically?

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