How to install windows?

Question

Windows

Good evening, I ask you not to criticize about the transition from linux, but to help solve the problem, checked it, tried it, did not like it.
The problem is, I tried a lot of articles on how to switch to windows, but I pressed something in the BIOS, now when I reboot there are no buttons on the screen to go to the BIOS, if I press f11 in my case, then the monitor goes to sleep and nothing does not happen, if you reboot without touching the keys, then linux starts.
There is windows on the flash drive, before the problem from above, the boot did not occur from the flash drive, the reboot and select proper boot device error appeared. I started looking for how to fix this problem and thus earned myself the problem that I described at the beginning. I don't know what to do anymore. I ask you to write without negativity in my direction knowing the Linux community.