AIO 5410 contrast/sharpness

Do you need the Dell On-Screen Display app for Win 11, if you don't already have it installed?

What GPU are you using, onboard Intel UHD (or Intel Iris) Graphics or NVIDIA GeForce MX550?

Either way, right-click an empty area on the desktop and look for Intel or NVidia Control Panel on the menu. Only of of those control panels will be listed. (NOTE: If the NVidia GPU is installed on the motherboard, you also have onboard Intel Graphics, but only one GPU can be used at a time, and the Nvidia GPU should give you better performance so that's the one you want to be using.)

Open the control panel and see if you can adjust screen settings there.

I have just bought an AIO Inspiron 5410 thinking it would have a well balanced system. In almost everything, this was confirmed. However, the screen was a disappointment. The factory sharpness setting is way overdone. The text is extremely aliased, with a black outline that is very uncomfortable to read. It seems that Dell wanted to compensate for the relatively low FHD resolution for a 24" screen with this, but it ended up making the situation worse. Is there any solution for this, besides returning the computer?

@abaymajr  - Which CPU do you have?  According to the specs, if you have an Intel 12th Gen i3 CPU, it has UHD Graphics, not FHD as you stated.  If you have a 12th Gen i5 or i7, it has Intel Iris X Graphics.

Have you tried to use the On-Screen Display app (linked above) to adjust the settings?

If you have an NVidia GPU in this PC, have you opened the NVidia control panel and tried to adjust settings  there?

If you only have Intel Graphics (either UHD or Iris), have you tried opening the Intel Graphics control panel and adjusting settings there?

Intel 12th gen i7-1255U CPU. The screen is F(ull)HD resolution, and the graphics adapter is the i7 builtin Intel Iris Xe. There's no sharpness adjustment besides the one for video content. The oversharpness can be seen even before the OS loading. So, there seems to be something to do with the screen itself.  The On-Screen Display does nothing after its installation, nor creates any shortcut for it. What should I except from this app?

@abaymajr  You're under warranty so contact Dell Tech Support. Have Service Tag handy. (Don't post Service Tag here.)

Same, actually took one back thinking it was a problem with that computer. But this one is the same, 27 and 24s doesn't make a difference, seems like Dell cheaped out and now I am returning this one too. Might be done with Dell after this experience. We might just be buying a different brand from now on. 

@Charles3887  Does your PC have a discrete (Nvidia) GPU, in addition to Intel Graphics which are on the CPU?

If yes, try disabling the discrete GPU in Device Manager and then reboot PC. That will force the PC to use Intel Graphics.

If that's better, either there's a problem with the discrete GPU card permanently attached to the motherboard and/or with its software. Either way, that might help lead to a fix, either by updating the software, and/or possibly updating BIOS or maybe replacing the motherboard.