"We managed to get hold of a copy of Windows Vista SP2 RC (Release Candidate) from Microsoft and decided to put it through its paces against Vista SP1 to see if consumers can expect to see any performance improvements in the latest service pack for the struggling Vista operating system.

Release Candidate or RC simply means that it is a possible final version for Microsoft to release to the public sometime soon after. Many previews of the Vista SP2 BETA were published toward the end of last year, but this is build 6002.16659.090114-1728 – a newer release which is likely to yield some improvements."