Windows Vista had a rough start when it first launched. And, if you're one of those few who're still using Vista, Microsoft has announced that they will be ending support for Vista SP1 on July 12, 2011.
This is in accordance to the service pack support policy, support for Vista RTM was killed on April 13 2010.
Customers will need to update their systems to Vista SP2 to ensure that their platform is secure. If a user doesn’t perform the required updates, it’ll leave their system vulnerable to attacks and exploitation.
Windows Vista users must upgrade their Service Pack to continue to be eligible for Mainstream Support on Windows Vista. Once support ends for Windows Vista SP1, users who’ve not upgraded to a support service pack will not have access to new security updates, non-security hotfixes, or the option to engage Microsoft product development resources.