Guru Meditation a critical error has occurred during the execution of the virtual machine and has be

[jhonny_javier]

Help, I can´t install Windows 10

[socratis]

00:00:00.994915 Guest OS type: 'Windows7_64'
...
00:00:00.996993 File system of 'C:\Users\Técnico\VirtualBox VMs\10\10.vdi' is ntfs
00:00:00.997403 File system of 'C:\Users\Técnico\Downloads\Windows 10 x64 R4 1803-17134.5.iso' (DVD) is ntfs

Those things don't agree with each other! Correct the VM template. I would suggest to delete the VM (including all files) and start from scratch. And note your available RAM, your computer is not that powerful.

[jhonny_javier]

I'm sorry for that, I've corrected it but it still throws the error

[socratis]

00:00:03.863233 Host RAM: 3984MB (3.8GB) total, 2292MB (2.2GB) available
00:00:03.949016 RamSize <integer> = 0x0000000040000000 (1 073 741 824, 1 024 MB)

The RAM that you've assigned to the VM is 1/2 of the suggested minimum (2048 MB) for a Win10-64 guest. At the same time you do have barely enough available RAM on your host. My suggestion? Change the RAM to 2048, reboot your host and run nothing else except VirtualBox, not even a browser.

00:00:03.949012 NumCPUs <integer> = 0x0000000000000001 (1)
00:00:04.219709 CPUM: Physical host cores: 4

At the same time, I would increase the number of CPUs to the VM to 2.