Under a separate contract, the insurance market, which has the capacity to accept £15bn worth of insurance premiums, has purchased two Unisys ES7000 servers plus infrastructure consolidation assessment services.
Lloyd's employees will receive IT support from the Unisys managed services centre in Milton Keynes. Unisys will also deliver remote server management from its managed services centre in the Netherlands.
The service will be based on industry standards, including the IT Infrastructure Library.
The desktop update is part of a wider shake-up of the insurance market's IT. Lloyd's has recently embarked on two major IT projects to eliminate paper-based transactions and help it compete against international rivals.
The projects - an electronic system for processing back-office and accounting transactions, and a document repository to store new claims - will cost £11m to implement and save £50m a year in costs, Lloyd's has estimated.