The activator is based on ZWT KMS-Keygen. KMS-Keygen is installed as Windows Service, not too much memory used, around 2 mb of RAM. Code generated by KMS-Keygen is not always valid, that�s why sometimes activation may fail. In this case just repeat activation request. This is KMS-Keygen problem, but not the the activator fault. Incoming search terms:kmservice downloadkm service office 2010km activatorkmservice office 2010km service officekm service activatorkm activator office 2010download KMServiceKMS Activatoroffice 10 activatOR