Assuming you have obtained a legitimate anyconnect-win-4.10.xxxx-core-vpn-pkg.exe , here is how to make it work.
: Version 4.10.07061 specifically had reported issues with the "VPN Service not available" error on some Windows 11 systems Download and Installation
Cisco does not sell single licenses to end-users. AnyConnect is a commercial product. If you are an employee, you should never need to "find" a download. Instead:
: Most users can download the client by navigating to their company's VPN address (e.g., https://vpn.company.com ) in a web browser. Logging in with your work credentials typically triggers an automatic download or provides a link to the installer matched to your operating system.