Technically, yes, but only if you never open PDFs from the internet or email. The error is both a compatibility issue and a security blockade.
Error 11001 in Adobe Reader XI typically indicates a DNS resolution failure or a network connectivity problem when the application attempts to validate a license, check for updates, or verify a digital signature online. The error message often reads: "The server name cannot be resolved" or "A network error occurred (11001)." adobe reader xi 11001
This was the era where digital signatures began to enter the mainstream. 11.0.01 supported Adobe’s EchoSign (later Adobe Sign) technology, allowing users to sign documents digitally and track the status of agreements directly within the free reader. Technically, yes, but only if you never open