i installed odoo 16 then uninstall it

so i need to install it again

when i install it this error happens:\

Database creation error: could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432?

i removel all postgress keys and folders from regedit

but it doesnt solve my problem

any idea?