can I upgrade to Windows 8.1 from Windows 8 without decrypting my drive encrypted with bitlocker?

Is there a KB or document available for the same?

Hi,

I think you can suspend BitLocker instead of decrypting it. More info you can refer to this article.

http://technet.microsoft.com/en-us/library/hh831507.aspx#BKMK_upgradeV27

can I upgrade to Windows 8.1 from Windows 8 without decrypting my drive encrypted with bitlocker?

Is there a KB or document available for the same?

Unless you are using a bunch of domain controller servers, I would avoid bitlocker as a real harzard

bitlocker is meant for spook shop like operations, not for private use as recovery is stored on servers