InfoWorld US reports that Dell will continue to sell and support Windows XP to consumers beyond the June 30 date that Microsoft reaffirmed as final sales date for Windows XP Professional. Dell will use a licensing option which Microsoft calls a "downgrade" license that allow buying a Vista Business or Vista Ultimate license and still provide Windows XP. Dell will preinstall XP Professional as a "downgrade" on a variety of desktop PCs and laptops, that include some Dell Latitude, OptiPlex, and Dell Precision systems as well as some Vostro and Dell XPS gaming systems where the downgrade will come for a small fee. The computers available with the XP option will include the Windows Vista installation DVD in the box so users can later install Vista over XP under the same license if they wish. Dell said it will utilize and support this program as long as Microsoft supports it.