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You cannot use the "runas" command to run Internet Explorer 7 in a different user account in Windows Vista
Article ID: 922980 - View products that this article applies to.
When you try to use the runas command at a command prompt in Windows Vista to run Windows Internet Explorer 7, you find that Internet Explorer 7 does not start. When this occurs, you are trying to use the runas command to run Internet Explorer 7 in an account that differs from the one that you used when you logged on to Windows Vista.
This issue occurs because Internet Explorer 7 does not support the runas command in Windows Vista.
To work around this issue, switch to the different user account in Windows Vista, and then start Internet Explorer 7 directly.
To switch user accounts in Windows Vista, click Start, click the arrow next to the Lock button, and then click Switch Users.
Article ID: 922980 - Last Review: October 27, 2007 - Revision: 2.1