I have a MBP 2011 running Mavericks and Windows 8 Pro. Both run fine. I noticed the 8.1 update in the Windows store. Is it safe to run it, will all the Apple drivers that work in 8 ork in 8.1? I ask only because everywhere I Google the discussion always seems to center on INSTALLING 8.1 in the first place; as I said, I installed 8 a while back using one of those "system builder" DVDs Microsoft sells. It's legal, activated, and runs perfectly. So I just need to know if anyone in a similar position installed the 8.1 update successfully.