command prompt

Computer, how old are you?

Dave Farquhar Windows , , ,

Yesterday I wrote about finding old computers. Here’s how I determine how old a computer is.

There’s a registry key called HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\InstallDate that stores the system build time in Unix format (the number of seconds since 1 January 1970) and hexadecimal. With a few mad skilz you can make that data human-readable.

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Some tips for trolling fake technical support calls

Dave Farquhar scams, security, Windows , , , , , , , , , , , , ,

I did a little more digging after getting yet another fake technical support phone call last week, and I’ve done some thinking on my own. If you want to troll these criminals when they call you, here are some ideas. Read more

Windows Technical Support calls me again

Dave Farquhar scams, security, Windows , , , , , ,

“Oh, so you think you’re Mr. Genius Man,” the crackly voice said, drowned out by static caused by his cheap VOIP connection. “Enjoy your broken computer, Mr. Genius Man. Goodbye, Mr. Genius Man.”

So ended 23 minutes of my life that I’ll never get back, but I figure it’s 23 minutes he wasn’t spending scamming someone else. I don’t do it often, but my kids were playing nicely and we were all in the same room, so I guess I don’t regret it too much. Read more

Troubleshooting machines that won’t update from WSUS or SCCM

Dave Farquhar security, Windows , ,

In my younger days, I administered WSUS on a small (300 servers or so) network. Every once in a while, I ran into an issue where a server just didn’t want to talk to WSUS. These days, some companies prefer to push patches with SCCM but it uses the same mechanism to push patches.

Apparently my old problem still happens from time to time. So I did some research to come up with a solution. This mechanism is still largely a black box, but it’s a lot better documented now than it was in my day. Here’s what I came up with for troubleshooting WSUS or SCCM. Read more

How to slipstream updates into Windows 8.1

Dave Farquhar Windows , , , , ,

I need a Windows box, so I figured I’d experiment with Windows 8.1. I know it’s terrible, but I want to see just how much less terrible I can make it.

The first thing I wanted to do was figure out how to slipstream updates into it. I recommend slipstreaming because you get a faster performing system, you get the system up and running a lot sooner, and you save a lot of unnecessary writes to your SSD. It’s very similar to slipstreaming Windows 7, but not quite identical.

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Merge CSV files from a command prompt

Dave Farquhar Office, Software ,

I had a bunch of CSV files I needed to merge. I don’t spend half an hour loading all of them into Excel and doing a bunch of copying and pasting. Here’s how I merge CSV files from a command prompt.

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How I upgraded a TP-Link TL-WR841N to DD-WRT

Dave Farquhar DD-WRT, security, Servers and Networking , , , , ,
How I upgraded a TP-Link TL-WR841N to DD-WRT

If you want a nice router or access point, you can do a lot worse than upgrading a TP-Link TL-WR841N to DD-WRT. The TL-WR841N is inexpensive and reliable, and DD-WRT runs well on it once you get the right build.

You can configure it to be a router, an access point, or a repeater, based on what you need. It usually costs $25 and sometimes you can find one on sale for $20 or even $15, so it’s a huge bargain. Even if you want 802.11ac speeds, a TL-WR841N makes a fantastic secondary access point to improve your connectivity.

Let’s get on with the upgrade. In the case of the TP-Link TL-WR841N (or TL-WR841ND, which uses the same build), it’s really easy–10 steps. Read more

Clean up after Windows Update

Dave Farquhar Windows , ,

Thanks to a new tool that Microsoft pushed out in 2013, it’s very easy to clean up after Windows Update and free up a bunch of disk space.

In 2013, Microsoft released a new Disk Cleanup tool. Click your start button and type “Disk Cleanup” to launch it. If you see a new option called “Clean Up System files,” you got the update. If you don’t see it, visit this page (Internet Explorer-only, unfortunately) to grab it. Read more

How I accidentally found a way to mess with “Peggy”

Dave Farquhar scams, security , , , ,

“Peggy” from “Computer Support Department” just won’t give up. He called me again at about 8 PM this evening. This time, I played along. I had a thrift-store junker PC for him to infect with his malware. The only problem was, the hard drive wasn’t connected and neither was the power cord. So I quickly hooked all that up, booted up, and then played along.

“I want you to click on Internet Explorer.”

“OK.”

“What do you see?”

“Page cannot be found.”

Thus I learned that Peggy isn’t very good at troubleshooting network issues. Read more

My phone’s micro SD card made Windows Disk Manager hang, but I fixed it

Dave Farquhar Android, Hardware , , , , ,

The micro SD card in my Android phone (a Samsung Galaxy S 4G, if that helps) quit working suddenly, and I finally got around to investigating it on Friday. I ended up having to solve two problems to do it, though.

Let’s start with Windows 7’s Disk Manager hanging at the message that says “Connecting to Virtual Disk Service.”

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