Hard Drive/OS Question

If I have a hard drive with Windows 8.1 installed and I connected the hard drive to a new pc without an OS, would it work the same? I have a laptop I bought from HP that has windows pre-installed and has no physical windows disc or key, if I built a new PC and just connected this hard drive would the OS carry to the new PC along with all the things I already have installed? Sorry if this is an obvious question. https://vidmate.onl/