how to open windows xp without logoff windows vista1 person needs an answerI do too

To do this, you will need to run XP as a Virtual Machine:"Install & Run XP Inside Vista (Virtual Machine)"< http://www.intowindows.com/install-run-xp-inside-vista-virtual-machine/ >HTH, JW

Hi Sachin, Is the computer on dual boot? You will not be able to select a different operating system without logging off from the other. You may refer: Install more than one operating system (multiboot):http://windows.microsoft.com/en-US/windows-vista/Install-more-than-one-operating-system-multiboot Please refer to the below mentioned link prior to posting your question, so that you can provide all the relevant information, for us to help you in a better way:http://support.microsoft.com/kb/555375 Regards:Samhrutha G S - Microsoft Support.Visit our Microsoft Answers Feedback Forum and let us know what you think.