Você configurou este GPO: Configuração do Computador / Modelos Administrativos / Sistema / Assistência Remota ?
A política é definida como:
This policy setting allows you to turn on or turn off Offer (Unsolicited) Remote Assistance on this computer.
If you enable this policy, users on this computer can get help from their corporate technical support staff using Offer (Unsolicited) Remote Assistance.
If you disable this policy, users on this computer cannot get help from their corporate technical support staff using Offer (Unsolicited) Remote Assistance.
If you don't configure this policy, users on this computer cannot get help from their corporate technical support staff using Offer (Unsolicited) Remote Assistance.