Ok I have had this problem , 2 weeks now , kept getting this code 0x80240031 after downloading from APP store at 50% , done everything that was posted here still no change. Decided to once again format Hard drive and reinstall Win 8 . ( SUCCESS ) Here's how I done it .
1. Reinstall Win 8..
- Activate win 8 then go to power settings and change (you don't want your pc to go to sleep during this)
- download all updates but only in groups of 20 ,it will take a little bit longer but it is worth the wait :-)
- Install your Anti-virus , I am using AVG with the tune-up. I checked my Registry with this tool and there was over 20 errors , hard to believe ?? Fixed errors and restarted.
5. Disable Antivirus and firewall
- download Win 8.1 from APP store
On the first attempt to install win8.1 it installed 100% but when it come configuring it failed and restored to win 8.
Now do this
Before going to the APP store and trying again( ,Disable your Anti-virus and firewall again
I believe that the first time somehow the anti-virus must have been turned on .
Second time was a success :-)