Dell has announced that it will stop shipping systems with Windows XP and XP Home this month, ahead of the Microsoft deadline.
Microsoft previously said Windows XP would be unavailable as a pre-installed operating system after 22 October 2010.
Dell will begin removing XP in September to ensure customers receive XP orders before the October deadline, said the PC-maker.
"Per Microsoft guidelines regarding Windows XP, system supliers like Dell will no longer be able to ship systems with XP Professional and XP Home after 22 October, 2010.
"This means that we will stop offering XP as an option for customers starting this month, in preparation for next month's deadline," said Dell's blog.
After 22 October, customers who order new machines with Windows 7 Professional or higher will only be able to run XP applications in Windows XP mode, said Dell.
The firm plans to continue Windows XP driver support until December 2012.
Microsoft support for Windows XP Service Pack 3 will continue until 14 April 2014 to allow users to migrate.