What should I do that my laptop is running again?

I wanted to reset my laptop, but accidentally deleted the software… Can we help who else?

The operating system (Windows) can't be started from the hard disk.

Either there's in the BIOS / UEFI the boot order adjusted, or the hard drive has a problem.

The screen tells you that you at least have destroyed the Master Bott Record (MBR) of Windows. The MBR is the starting instruction of Windows.

I recommend you insert the Windows CD and start it from CD to repair Windows. Usually you come to a menu where there are also repair options.

I also think that you have changed the boot order. When booting, press F2 or Remove and change it in the boot sector so that your main hard drive (which is Windows) is UP, not the CD drive. Save with F10. Restart

Where can I get such a Windows CD?

This can usually be downloaded on the windows page. Must on Google Windows x (= Your Windows just) Enter Image Download.