Paul Cameron, Suncorp's general manager of IT infrastructure, said the bank had completed a "very well" executed integration project with GIO acquiring it "a few years ago".

Despite this, most of Suncorp's server and desktop infrastructure is still based on the now-unsupported Windows NT platform, which the company is keen to leave behind.

"We have a huge amount of NT on the backend for domain controllers and name servers," Cameron said, adding that over the next 18 months we will remove all NT systems which are also in branches and on desktops. "The migration has been in planning for a while and started [aggressively] three months ago. It's now moving ahead quickly."

Suncorp has about 2000 servers and 9000 desktops and the move from NT will be to Windows Server 2003 and Windows XP.

In the NT legacy issue - where many businesses are now using unsupported technology - Cameron blames organizations, not Microsoft, "for not having investment plans".