kindly reply specifically as im developer

I think unless you are developing something that will specifically make use of components only found in the Ultimate edition, to test, than Professional would be your best bet. And save a few dollars in the process. See below for a link to the differences between versions. On the contrary, if you feel you need to protect your work, than BitLocker might be an option for you. This is only available in the Ultimate version. See here for edition break down. -> http://www.microsoft.com/windows/windows-7/compare/default.aspx Network Systems Engineer * Zvetco Biometrics * Windows Server 2008 R2 * Core2 6600 @ 3.30GHz * 16 GIGS RAM * NVIDIA 9400GT * ** " Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.