Patent ID: 8346886

Claim:
A server computer in a computer system, the server computer comprising: a master operating system (OS) comprising a set of computer program files and at least one configuration file to operate a client computer, wherein the master OS forms a complete operating system; a version managing program configured to: create a new version of the master OS by modifying at least one of the set of computer program files; and maintain a plurality of versions of the master OS, including the new version of the master OS; and a server program configured to transfer the new version of the master OS as read-only files to at least one of a plurality of client computers each having a cache memory that includes a first logical partition and a second logical partition, wherein the new version of the master OS is transferred to be cached in the second logical partition of the at least one client computer if an older version of the master OS that is being used to operate the at least one client computer resides in the first logical partition.