Argthtjtr

I need to change my screen's resolution from the command prompt, I've tried QRes and NirCmd and both weren't able to change the screen resolution (i've already checked the syntax). Is there any way to it?

I've NirCmd and it wasn't able to change the screen resolution

Actually nircmd from nirsoft can change the screen
resolution:

setdisplay {monitor:index/name} [width] [height] [color bits] {refresh rate} {-updatereg} {-allusers}

Changes your display settings.

• The [width] and [height] parameters
  represents the number of pixels on your screen.




• The [color bits]
  parameter represents the number of colors shown on your screen (8 -
  256 color, 16 - 16bit color, 24 - 24bit color, and so on).




• {refresh rate} is an optional parameter that specifies the monitor refresh
  rate.




• If you specify the {-updatereg} parameter, the new settings
  will be saved in the Registry.




• If you specify both {-updatereg} and
  {-allusers} parameters, the new settings will be saved in the
  Registry for all users.



• 
  

  If you have multiple monitors, you can use the optional monitor
  parameter, which specifies for which monitor you want to change the
  display settings.

  
  
  

  You can specify the monitor by index (0 for the
  first monitor, 1 for the second one, and so on) or by specifying a
  string in the system monitor name.

  
  
  

  The monitor name can be found in
  the Device manager of Windows: Right click on the monitor item, and
  then choose 'Properties'. The string displayed in the 'location' field
  is the monitor name.

  
  

Examples:

setdisplay 800 600 24 -updatereg

setdisplay 1024 768 24 90

setdisplay 1024 768 8

setdisplay monitor:1 1024 768 24 90

setdisplay monitor:name1 1024 768 24 90

Source NirCmd Command Reference - setdisplay

Disclaimer

I am not affiliated with nirsoft in any way, I am just an end user of their software.

You can try the free tool I developed: http://tools.taubenkorb.at/change-screen-resolution/

Just call it like this:

ChangeScreenResolution.exe /w=800 /h=600