Is the file extension correct on my file?

Have you ever experienced the scenario where you receive a file and it won’t open for various reasons?

I experience this a lot. The file might in some cases be corrupt, but in most cases the file extension is just plain wrong.

In my experience the software called TrID by Marco Pontello is one of the best when it comes to finding out what kind of file it is eventhough the file extension might indicate something else.

You can download the command-line version called TrID – File Identifier:
As an alternative you can download the .Net version called TrIDNet – File Identifier:

When you download the main software, remember to also download the TrID XML definiton listed on the same pages, with the file extension definitions that cover about 5000+ different file types.


  • Extract both the software and the definitions in a folder (or the same folder).
  • Under ‘Definition path’ press ‘Browse…’ and choose the folder where the definitions are.
  • Press the ‘Rescan Defs’-button and let it scan all the definitions.
  • Choose ‘Browse…’-button at the top and browse for the file in question and press the ‘Analyze’-button.

The result will show you which type of file it actually is no matter what file extension it has.

Activate Clean Install of Windows 8 Professional Upgrade

In Windows 8 Microsoft have made it a little more difficult to activate a clean install of the Windows 8 Professional Upgrade than it was with Windows 7.

This is how it’s done:

  1. Run the registry editor by typing ‘regedit‘ on the start screen
  2. Find the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\OOBE
  3. Change the value for ‘MediaBootInstall’ from 1 to 0
  4. Open an elevated command prompt by typing ‘cmd‘ at start screen and right clicking, then choosing ‘Run as Administrator‘ at the bottom
  5. Run the following command: slmgr -rearm
  6. Reboot


Disclaimer: I can’t be held responsible for any problems that might arise from following this guide.

How to enable AHCI mode after Windows Vista / 7 Installation

This issue is known by most tech guys all around the world: People make an install of Windows 7 on their newly bought SSD and afterwards find out that they will get better performance with AHCI-mode enabled.
If you enable AHCI after the install of Windows Vista/ Windows 7 the boot procedure will result in a Blue Screen. This is the result of the harddrive controller changing when you enable AHCI.

So is there a way to enable AHCI after the install of Windows Vista / 7?
The short answer is “yes”.
You will need to disable AHCI while performing the procedure, but you’ll be able to enable it afterwards and make Windows boot normally without Blue Screens.

Your question might be: “How do I do it?”. Well it’s pretty easy. Follow these steps and you’ll be running your computer in AHCI mode:

  • If you’ve already enabled AHCI, please go into your BIOS to disable it.
  • Let Windows Vista / 7 boot like it normally would
  • In the Start menu search field write: Regedit
  • Go to the registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\msahci
  • Right click on “Start” and  choose “Modify”
  • In the Value Data field enter “0” (zero) and click “OK”
  • Exit Regedit
  • Reboot the computer and enter the BIOS
  • Enable AHCI
  • Let Windows Vista / 7 boot up
  • Standard AHCI drivers will be installed, and you can now install the manufacturer AHCI drivers if you want.
  • Reboot the computer and you are done with enabling AHCI.


Disclaimer: I can’t be held responsible for any problems that might arise from following this guide.


How to change default program to launch Windows .lnk files back to normal

I sometimes through my work with in-house support see this happen. For some reason the user associates for example Internet Explorer or another program with the .lnk files, if asked what program they want to use to open the file.
This normally turns out to become a big problem, as all programs on the desktop and in the Windows Start-menu, now tries to open in the selected program.

You can fix this rather easily by following the below steps:

  1. Click Start Menu, and type: regedit in the Start Search and press <ENTER>.
  2. Navigate to the following registry branch:

    Replace the [ext] with the actual file extension that you want to restore . If you are unsure, browse through all the sub-key under FileExts.
  3. Delete the sub-key named UserChoice.
  4. Exit from Registry Editor.

After you’ve gone through all the needed extensions, reboot the computer and you should be ready to go.



Disclaimer: I can’t be held responsible for any problems that might arise from following this guide.

Installing Ubuntu 9.10 on Zepto Znote V11a / Marasst X11A / Lengda M11A netbook


This guide will guide you through, step by step, on how to install Ubuntu 9.10 on the Znote V11a/Lengda M11A/Marasst X11A netbook and to get everything working, including the touchpad.
I originally created this guide back in February 2010 for my old blog, which was hacked and the database deleted. I know this is an old guide, as Ubuntu 10.10 has arrived, but I didn’t think it needed to go to waste anyway.

This guide will walk you through the steps of the English install, and all the selections will be the English ones. If you are installing Ubuntu 9.10 in any other languages the selections might be different.

Hardware specifications:

As the Znote V11a / Lengda M11A / Marasst X11A at the release in September 2009 were pretty unique regarding the hardware specifications, I’ll just summarize them:

  • Intel Atom N270 1,6GHz
  • 1024MB PC5300 DDR2 RAM
  • Intel GMA 950 onboard graphics with up to 224MB shared RAM
  • 160GB Western Digital 5400 rpm hard drive
  • Realtek based 10/100/1000Mbit network
  • Realtek based 54Mbit wireless network
  • 1.3MP Webcam
  • 11.1” LED backlit LCD screen with a 1366×768 resolution

Some of the specifications are pretty bland and standard netbook stuff, but especially the 1Gbit wired network, 1.3MP webcam and 1366×768 screen resolution on the 11.1” screen where pretty unique as other manufacturers released similar specifications 1-2 months later.

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