Does Windows encryption work on all versions of win 8.1?

i_am_jim

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Aug 27, 2008
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I need to use Windows encryption and the Encrypt contents to secure data check box is grayed out. Googling around I found a Vista solution but it doesn't solve my problem. It was to change a registry key from 1 to 0 but mine's already 0.

Does encryption work on Win 8.1? If so, how do I make the grayed out box light up.