After I changed to 8.1 64bit, I lost apps I had on computer. They are still there but nothing happens when I click them. I have been to Playstore to redownload and it stops near the end with message "Couldn't be downloaded error message 0x80246007" I also can't access pc settings on my computer - just a blank screen. Microsoft told me a few things to try like clearing cache etc but I can't get them to download om another laptop so I feel it is a problem with My Playstore account. Very frustrating as I have paid for quite a few apps.