The Ministry of Culture and Heritage is looking to replace its PCs at a rate of 40 a year over the next three years.
It will be buying around 40 desktop computers from a supplier straight away. The supplier will also provide warranties for the computers.
Laptop purchases will take place in the second year.
The refresh is due to the Ministry needing a common operating system for its PCs and laptops.
It mostly uses Microsoft equipment, running Windows XP on the desktop, Office 2003, Outlook/Exchange, Windows Server 2000 and SQL servers.
The Ministry has an existing relationship with Datacom who will continue to provide desktop support.
The deadline for replies is Friday, June 26. More details are available on the Government Electronic Tenders website under ICCNZ reference 26344.