Warm greetings from Amoy!
Many folks in China, like me, have a Lenovo, and I love my X220T Tablet--especially writing on the screen for class lectures, rather than using blackboards or PPT. But I've been frustrated with various Lenovo issues (some software, and two hard drives went out within a year--I wonder if they buy them used?)
Today, the Lenovo decided to quit charging the battery! I knew the battery was fine (this is a new Lenovo), and the charger was fine. The PC said the battery health was good--but no charging, and it was down to 9%. I was so frustrated at Lenovo--and then found out it is Microsoft's fault--a problem with Windows 7 that has been around for two years, at least! Why could Microsoft not have fixed it by now?
Fortunately, after searching the internet, and trying many things, I found the solution on Jeffrey Palermo's blog--though I will add a step or two he left out (assuming we knew too much).
These are Jeffrey Palermo's steps--with just my note to make one part easier):
1. Disconnect the A/C power supply.
2. Shut down the computer.
3. Remove the battery
4. Connect the A/C power supply
5. Start the computer.
6. Under Battery... (here's the problem, Jeff--where is "battery?" I searched, and finally remembered it is under Control Panel, then System, then Device Driver, then Battery)
7. Click on Battery (at the top), and then right click on all entries that say Microsoft ACPI Compliant Control Method Battery, and select uninstall.
8. Shut the computer down.
9. Disconnect the A/C power supply.
10. Insert the battery.
11. Insert the A/C power supply.
12. Start the computer.
13. It should be fixed--thanks to Jeffrey Palermo! Visit his blog to read what others have experienced, and solutions for those with Samsung computers, etc.
And my apologies to Lenovo for not giving them the benefit of the doubt. Let's just hope Microsoft gets there act together. I've no idea how they can roll out Windows 8 when 7 still has so many bugbears (After two years, I still cannot play simple MP3 files with Windows 7 Professional Multimedia Player--network errors, it says, though the network is completely disconnected. And to think I paid extra for that.... ).