The computer name %2 contains one or more non-standard characters. Standard characters include letters (A-Z, a-z), digits ...

The computer name %2 contains one or more non-standard characters. Standard characters include letters (A-Z, a-z), digits (0-9), and hyphens (-). Using a non-standard name might affect your ability to interoperate with other computers, unless your network is using the Microsoft DNS Server.
Do you want to use this name anyway?