How to solve the problem of site transfer?

Question

PHP

Hello.
Transferred a folder with a website from a desktop to a laptop.
Having also configured OpenServer, as well as on a stationary one, only the main page opens. When you go to any other link, it gives an error:
What is the error and how to solve the problem?
PS switched from Windows 7 to Windows 8.1, OpenServer 4.9, did not copy the database and wrote a copy from scratch

Answer 1

it is possible that the hidden .htaccess file was not transferred during the transfer, check in the total commander

Answer 2

CNC is not configured, probably. What do URLs look like?

Answer 3

Might be worth checking out the coding.