It'll do your dishes and take out your garbage, too.
Microsoft released this "Release Candidate Refresh" late last week--just one month after the initial release candidate made its debut. The company asserted that it wants additional information from testers, which indicates that even more bugs need to be fixed. But what does RC Refresh really do? Is it really that large? Most importantly, do you need it?
Before we get to the nitty-gritty of whether it's worth downloading, the download itself needs a little explanation. First off, Microsoft warns that the SP1 RC and the Refresh should not be installed on primary or mission critical machines. Make of that what you will. Check out the changelog to Vista SP1 RC. If it's something you think your Vista installation needs, carry on. But keep in mind that, as a release candidate, it's not intended to be a fully stable version.
So, if you installed the original SP1 RC from December, you'll need to uninstall it. Go to your Control Panel/Windows Update/View Installed Updates, and then follow the instructions for uninstalling.
Windows Vista, Security Update, Service Pack, SP1, Vista SP1, RC, Release Candidate, Refresh, Microsoft