Posts Tagged ‘background’

Change Windows 10 default lock screen image via win registry LockScreenImage key change

Tuesday, September 21st, 2021


If you do work for a corporation on a Windows machine that is part of Windows Active Directory domain or a Microsoft 365 environment and your Domain admimistrator after some of the scheduled updates. Has enforced a Windows lock screen image change.
You  might be surprised to have some annoying corporation logo picture shown as a default Lock Screen image on your computer on next reoboot. Perhaps for some people it doesn't matter but for as a person who seriously like customizations, and a valuer of
freedom having an enforced picture logo each time I press CTRL + L (To lock my computer) is really annoying.

The logical question hence was how to reverse my desired image as  a default lock screen to enkoy. Some would enjoy some relaxing picture of a Woods, Cave or whatever Natural place landscape. I personally prefer simplicity so I simply use a simple purely black

To do it you'll have anyways to have some kind of superuser access to the computer. At the company I'm epmloyeed, it is possible to temporary request Administrator access this is done via a software installed on the machine. So once I request it I become
Administratof of machine for 20 minutes. In that time I do used a 'Run as Administartor' command prompt cmd.exe and inside Windows registry do the following Registry change.

The first logical thing to do is to try to manually set the picture via:

Settings ->  Lock Screen

But unfortunately as you can see in below screenshot, there was no way to change the LockScreen background image.


In Windows Registry Editor

I had to go to registry path


And from there in create a new "String Value" key


so full registry key path should be equal to:


The value to set is:



If you want to set a black background picture for LockScreen like me you can download my black background picture from here.

That's all press CTRL + L  key combination and the black screen background lock screen picture will appear !

Hopefully the Domain admin, would not soon enforce some policty to update the registry keys or return your old registry database from backup if something crashs out with something strange to break just set configuration.

To test whether the setting will stay permanent after the next scheduled Windows PC update of policies enforced by the Active Directory (AD) sysadmin, run manually from CMD.EXE

C:\> gpupdate /force

The command will download latest policies from Windows Domain, try to lock the screen once again with Control + L, if the background picture is still there most likely the Picture change would stay for a long.
If you get again the corporation preset domain background instead,  you're out of luck and will have to follow the same steps every, now and then after a domani policy update.

Enjoy your new smooth LockScreen Image 🙂


Energy Saving simply by changing Google’s background color

Saturday, August 16th, 2008

Recently I heard from a friend, somebody made a calculation and estimated that there are a lot of electricity gone for nothing just by the white color background of Google thus if everybody on the planet simply choose to change the background to black of his beloved search engine google it’s possible to save a lot of energy up to 750 MegaWatts per year, thus the website blackle was created. Of course blackle does make requests to Google and it needs some more energy to keep the website up running and serving on the other hand routers which route the traffic to blackle and later redirecting to google are consuming energy too, thus my personal belief is it’s pretty controversial does it really save energy to use blackle. There is another alternative and this is Firefox plugin called GreaseMonkey+the custom userscript called “dark google”. This plugin in combination with the script makes Google’s background black through few browser defined Javascripts and uses directly the Google search engine. I personally I’m going to try that and if it’s working fine maybe I’m going to use that. From my perspective there is another reason for which you may use Google on a black background. Maybe at least 10 or 20% of the time I’m infront the PC I use Google, so using Black background on my Laptop LCD screen is beneficial for the slower depreciation of my LCD screen, it’s well known that in order to make an LCD pixel white white is illuminated thus with the months and years making that pixel more likely to burn. On the other hand using black background makes your black pixels less used and abused 🙂 by the illuminating light on the pixel’s molecules all the time the probability for a problems increases tremendously. To figure that out I used common logic so ofcourse I may be wrong. Thinking in the same manner I think a lot of energy could be saved by the simply altering most or all of the background colors out there.END—–

A quick way to change picture background with the Gimp

Wednesday, September 23rd, 2009

I wanted to change the background of a picture of a Russian Orthodox Cross I’ve downloaded from the net. After some time spend experimenting and reading a couple of articles online I did it :).
Here is how:
1. Open an Image in Gimp through the File -> Open as Layers menu.2. Use Fuzzy Select tool to select regions based on color of the image you'd like to change the background.3. Open a new File in Gimp via New -> File menus.4. Select again the window containing the image you selected with the Fuzzy Tool and press Ctrl+X.5. Now go again to the newly opened picture and use the: Bucket Fill Tool with some selected color to select thenew background for the future image.6. Now after having a background color already selected use Ctrl+V to paste your previous selection Well congrats, you should now be having the good old image on a shiny new background.END—–