Here's something to try if you can't get W10074 to boot with date set back. I can't test it because my pc's all boot happily in 2013.
wdf01000.sys is involved with verifying hardware drivers. We have different hardware so probably different different drivers installed. One or more of these is probably failing the verification process during boot because the date is set and confusing the process.
Something similar happens when I try to use a browser with date set to 2013, I get message "there is problem with website security certificate - it has expired or is not yet valid". Time travel is rather confusing isn't it"
So you could try this solution to disable the Verification process, its Option 2 :- http://www.sevenforums.com/tutorials/101379-driver-verifier-enable-disable.html
Good luck
Colin