Heya all, I got 8.1 working on my TF810C, and it surprisingly wasn't that hard considering that it's meant to be completely incompatible. 1. Download the .iso here: Windows 8.1 Preview ISO files - Microsoft Windows 2. Open the .iso, then run the setup. No need to make a bootable USB or something, thanks to Windows 8 being able to mount .isos natively. 3. Go through the installation process. Do NOT check for updates. When asked for a key, use the one on Microsoft's website. 4. Pick whichever installation you like. I kept all my apps and everything, and it all seems to work. Even desktop apps work well. 5. Installation is SLOW. Your tablet will restart. 6. After booting, you'll eventually get to a black screen. I could move the mouse cursor, but nothing else would work. Hold down your power button and boot again. It will be very slow as it checks for devices and such. 7. This time, after booting, you'll get all the way to choosing your wifi network to connect to, and perhaps login (I can't remember). I couldn't find the network I was already connected to, for some reason. After going to the next step, you'll get a black screen again. Hold down your power button and boot again. It will check for devices again. 8. You'll be able to fully boot into Windows 8. It will be VERY laggy. This is because the graphics drivers are missing. Installing drivers, fixing the massive lag Option A: Install all your drivers: http://www.mediafire.com/?w7bfuedwqg7326a What I linked above is an extraction of the temporary files that are made when running LiveUpdate. I couldn't get the driver download from ASUS's site to work, unfortunately. Option B: Open Device Manager, go to your display adapter, search online for updates of it through the properties panel. Option C: Update through Windows Update I've noticed that options B and C may lead to your tablet sometimes being unable to wake up from sleep. The power button must be held and a restart done. Getting your battery icon back There's no way to tell what your battery % is. The system doesn't have a clue, no matter where you look. This can thankfully be fixed. Temporary fix: Go to Device Manager. Go to Batteries. Uninstall the driver listed there. Now, through Device Manager's menu options, search for missing hardware/updates. Whichever the option it is. All battery icons should be back right away. This sadly resets once you reboot your tablet. Permanent fix: Download this: http://www.mediafire.com/?4h39bnacax5me41 Follow the readme carefully!! What this does is create a scheduled task that rescans your hardware every time you boot. Unfortunately, I couldn't get this working. So what I did instead was put all the files at C:\BatteryIcon. Then I followed instructions to create the task manually. Schedule a task You want a task that runs whenever you logon (not system start!!), and runs the BatteryIcon.bat file. I edited the BatteryIcon.bat properties to give my user full permissions when running it, just to be sure. Misc stuff -Run Disk Cleanup to delete your ~15GB+ windows.old folder. For some reason Disk Cleanup can't be searched for, so find it in Control Panel -Get used to the new shortcut windows+S. This opens the new search. It's AWESOME! -For some reason two finger scrolling works in the other direction, now. The double-finger tap for right click, and edge-swiping still works unchanged, though. -Finger scrolling is no longer super smooth. Windows 8.1 thinks that it's a mouse wheel, and so scrolls in chunks. I haven't really attempted a fix yet. -During the driver installation phase, my tablet could not shut down. I had to hold down the power button. This fixed itself up once everything was installed, though. -I had to update my Wacom drivers from the US Wacom website, too in order to get them fully functional. Select Tablet PC and Windows 8. There were no problems. -I can no longer use the registry edit to give me 4 rows of tiles instead of 3. No matter, small sized tiles would be too tiny anyway. -Beware of Skydrive. There is no longer a desktop app. It's all run through the OS itself, which is GREAT!! Sadly, it's a bit buggy. On my notebook with Windows 8.1, it's constantly bogged down with items "pending" to be downloaded. Now syncing is VERY dodgy for me on that computer. I believe it happened because I tried to sync about 250 wallpapers at once through the Personalisation menu. It didn't like that. And now it's completely borked. No problems with my tablet, though. -UPDATE to Skydrive issue: It's still a bit unstable, and doesn't show upload or download progress any where. If you try to download 2 files at once you may get failures. If you install Office 2013, prepare for trouble, as this installs ANOTHER Skydrive program that conflicts. Uninstall Skydrive from the control panel to attempt to fix this. -The camera doesn't work until you refresh and rescan in Device Manager. Unfortunately, it doesn't stay working for more than a few minutes once you stop using it. General smoothness and stability after doing these is about the same as standard Windows 8. It's a bit sluggish at times when searching, though. It seems to boot faster, however. Anyhow, I LOVE Windows 8.1 Give the preview a try if you're brave enough!