It is important for computers to have unique names specially when they are connected to a network, so that systems can identify and communicate between each other. Now there are going to be times where you are going to need to change the computer name, for example, because you bought a used computer and it has a terrible name or just because you’ve tired of the old name and you just want to change it.
Changing the computer name in Windows 7 is not a hard process, but there are some things that you want to keep in mind, such as: Try not to choose a really long name, keep it to fifteen characters or less and choose a descriptive computer name. It is recommended to use Internet-standard characters, like using numbers from 0 through 9, letters from A through Z (lowercase and uppercase), and the hyphen (-) character; avoid using just all numbers or spaces, or special characters like < > ; : ” * + = \ | ? , these are invalid ways to name a computer in Windows.
Follow these steps to change your computer name:
1. Save all your documents and then close all running programs.
2. Go to Start 
, in the search box type system, and from the search result under Control Panel, click System.
3. In the System window under Computer name, domain, and workgroup settings, click Change settings (type the administrator password if required).
4. Now under the Computer name tab, click the Change button.
5. Look for the Computer name field, delete the current computer name, and type the new name, then click OK (enter user name and password if required).
6. Your computer need to be restarted for the changes to take effect, click OK, Close and Restart Now.
And now you should have a Windows 7 system with a brand new computer name.
Mauro Huculak is a Windows How-To Expert who started Pureinfotech in 2010 as an independent online publication. He has also been a Windows Central contributor for nearly a decade. Mauro has over 14 years of experience writing comprehensive guides and creating professional videos about Windows and software, including Android and Linux. Before becoming a technology writer, he was an IT administrator for seven years. In total, Mauro has over 20 years of combined experience in technology. Throughout his career, he achieved different professional certifications from Microsoft (MSCA), Cisco (CCNP), VMware (VCP), and CompTIA (A+ and Network+), and he has been recognized as a Microsoft MVP for many years. You can follow him on X (Twitter), YouTube, LinkedIn and About.me. Email him at [email protected].