I brought the Fujitsu LifeBook U820 UMPC shortly after it was released 4th quarter last year. With a rotatable touch screen for tablet mode, Bluetooth, GPS, WiFi, memory card readers, and a camera, it had all the gadgets I needed built in a very lightweight and compact computer. The only dissatisfaction was Windows Vista, the default OS it came with. The Intel Atom Processor Z530 was simply not power enough to support such a … piece of software. 
Fujitsu probably also knew about this because I managed to find U820 drivers for Windows XP Tablet PC on their support website. Without anything to lose, I decided to give it a shot.
Fujitsu Windows XP Tablet PC Drivers
I managed to find a copy of Windows XP Tablet PC and did a fresh install on my U820. The first thing I learned was the drivers didn’t install properly without Service Pack 3 and .NET Framework 2.0 or above.
Before doing anything else, the first set of drivers I installed were the “Chipset” and “Video (Intel)”.
To enable the 3 buttons below the screen, I installed the “Button Driver” and “Button Utilities”.
Next, to resolve the unknown devices found in the Device Manager, I installed the “Fujitsu System Extension Driver: FUJ02E3″ and “Fujitsu HotKey Driver”, followed by the “Fujitsu System Extension Utility” and “Fujitsu HotKey Utility”
The touch screen wouldn’t calibrate properly but was resolved by installing the “Pen” driver.
The rest of the drivers were pretty intuitive and could be installed in any order.
The drivers which I didn’t install were:
AT&T Communication Manager
AT&T Service Activation
Fujitsu Power Saving
LAN
Pointing
WWAN (Sierra Wireless)
As expected, the computer was a lot more responsive and significantly faster when running Windows XP. The only issue is the volume scroll wheel doesn’t work until the computer wakes up from Standby.
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