The built-in Windows XP Firewall or an old third-party antivirus is blocking AnyDesk’s ports.
While newer versions of AnyDesk exist, you may need a specific legacy version for optimal stability on Windows XP (specifically Service Pack 2 or 3). Download the official Windows application from AnyDesk. anydesk windows xp
| Software | Works on XP? | Verdict | | :--- | :--- | :--- | | | Yes (v2.0) | More secure? No. Slower? Yes. But open source. Better for LAN-only. | | UltraVNC | Yes | Good for single LAN, but no cloud address book. | | TeamViewer | No (v14 was last, now blocked) | Useless – servers reject old clients. | | RDP | Built-in | If you have Pro edition, this is safer than AnyDesk. Use it instead. | The built-in Windows XP Firewall or an old