Shutter speed is WAY to fast. Its telling you the subject is to dark... lower your shutter speed.
If your going to shoot in Manual you need to pay close attention to the meter in your viewfinder.
Instead of Manual, you may want to use aperture priority or shutter priority. This way you still have some control over settings, yet the camera can also assist you. Or use Program. You can have control over what ISO you use and let the camera choose the shutter speed and f/stop. As you get more fimilar with exposure settings you can then change to aperture or shutter priority, or if you really want, Manual.
I agree with all of that.
I also notice that the ISO is set to 100. 100ISO is for shooting in very bright situations like direct sunlight. For darker indoor situations, move the ISO higher. When I shoot indoor with no flash, I set my ISO to 1600 (and that's not always high enough to shoot with no flash, either!). When I shoot indoor with flash, I set ISO to 400.
For the moment, forget Manual mode. Set your camera to Program AE mode.
In P mode, the camera will select both aperture and shutter speed for you. You will still have to set the ISO, based on your situation, but figuing out how to set ISO first, and letting the camera do the rest, is a much better way to ease into learning photography than jumping directly into Manual mode.
ISO, shutter speed, and aperture are kind like those puzzles you play with as a kid, where you have 8 tiles ans one empty space, and you have to move them all around to get the tiles in the proper order - every time you move one, it throws the others ouot of whack, and you need to re-adjust them all.
So start in P mode first. Once you get the hang of choosing ISO (super-sunny and bright=100, moderately sunny=200, partly cloudy to early dusk=400, dusk to dark=800-1600, full dark=1600 or more), then you can try the semi-manual modes.
Av is Aperture Priority. You set the aperrure, the camera sets the shutter speed. I find this useful for playing with depth-of-field (which is the range of distance that stuff is in focus in the shot).
Tv is Shutter Speed Priority mode. You set the shutter speed, the camera sets the aperture. I use this one a lot to do things like freeze moving objects like running people and the spitting fountains at Epcot, and to soften moving water into that white frothy look.
I bet if you set the camera to P mode, set the ISO to 800 or 1600, and re-take that laptop pic, it will come out as well or better than with your old camera.