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QIP 2005 was one of the most popular Windows clients for ICQ: lightweight interface, tabs, statuses, sounds, and the familiar contact list. After the official ICQ shutdown, it stopped working with the original servers, so simply installing an old EXE is not enough. QIP can still connect to a compatible server. Download QIP from the download page, create a new account, open connection settings, and set server icq.jimm.fun, port 5190, proxy NONE. If QIP says the server is unavailable, check Windows firewall, antivirus, VPN, proxy settings, and the port number. If it says the password is wrong, make sure you enter the UIN and password from the new account, not credentials from the old official ICQ network. QIP is useful for testing because errors are easier to see on a desktop, settings are easy to change, and the server value can be copied. Once logged in, you can add contacts, change status, and use a client that feels like ICQ from the 2000s.
QIP was a client, not the server. When official ICQ shut down, the client lost its original endpoint. To work in 2026, it needs a compatible server and a new account.
Check firewall, VPN, proxy, antivirus, and port. If QIP reports a wrong password, make sure you use the new UIN rather than an email address or an old number from the closed network.