microsoft excel logo primary

How Excel counts business days, holidays and more

Excel makes it easy to find how many days there are between two dates. With a little more effort, you can find the number of days in which people will be actually working.

spilled water laptop stock

When water, coffee, or liquid spills on your laptop, do this

A water spill can seriously mess up a laptop. Soft drinks or alcohol can do much worse. Work quickly and you might be able to save it.

0511 primary

The hidden challenges of booting from a USB flash drive

Booting from a USB drive lets you get into your PC when its main operating system. But Windows and even your motherboard could work against you. Here's how to find out.

petya ransomware logo

How to stop ransomware: Backup can protect you, but only if you do it right

No one wants to give hundreds of dollars to extortionists. But if you take the right precautions beforehand, ransomware probably can't hurt you.

facebook logo crop

Your Facebook account's been hijacked. Here's how to recover it and keep it safe

Your Facebook account tells a lot about you and your social circle. You need to keep control of it.

0129 primary

How to recover files from a dead external drive

It's just like an internal drive, but with a case and a plug. If the files on that drive aren't backed up, you could have a disaster, but there may be some hope.

0425 primary

You can dual-boot Windows 7 with Windows 10, but there's a catch

You can dual-boot old and new operating systems, but if you upgraded to Windows 10, your old Windows 7 is gone. Here's how to start over.

Your PC has malware! Here's how to remove it

pcworld.com

Malware is designed to stay put. You should be able to get rid of the malicious code with these steps.

Windows 10’s hidden hard drive partitions: How to find them, how to remove them

Your Windows PC came with one or two partitions you're not supposed to touch, and upgrading to a new Windows version just creates more. You might be able to get back a little storage space, if you tread carefully.

How to move an old Windows XP PC to Windows 7 or Linux

A Windows XP PC could be 10 or 15 years old, but you could still use it for something other than a fishbowl.

thinkstockphotos 89076448

3 fixes for a dead Windows 10 Start menu

We all celebrated when Microsoft brought back the Start menu. But that joy disappears quickly if the Start menu doesn't pop up. Here are three possible solutions.

0407 primary taskbar menu

7 Windows taskbar tricks

That bar of icons at the bottom of the desktop isn't just for pretty pictures. Here are a few ways to configure the taskbar and make Windows easier to use.

0404 primary default programs

Set which program opens when you double-click a file

Every data file on your PC should be associated with an application, so that opening the file will open the right program. But the official "right" program isn't always the right one for you.

0329 primary local account

How to make your Windows 10 user account local

The account you log onto in Windows 10 is probably connected to Microsoft. Here's why you might (and might not) want to change that and how to do it.

DDR4 memory

Do you have bad RAM? Here's how to find out

Defective RAM can cause all sorts of problems. If you're wondering why your PC isn't behaving, a RAM diagnosis may be in order.