Asus has debuted a sleek Windows 7-based tablet with a 10 hour battery life at Computex 2010.

The 12″ device – which is powered by a CULV Intel Core 2 Duo processor – functions as a multimedia player (yes, Flash is supported), e-reader and compact computing device.

As expected, the Eee Pad EP121 is capable of effectively handling (true) multitasking, video conferencing and the simultaneous processing of Microsoft Word and Excel documents.

In addition, the EP121 offers two modes of character input: an embedded virtual keyboard or hybrid keyboard/docking station design.

The company also introduced a smaller, more cloud-oriented 10″ Pad dubbed EP101TC which runs Windows Embedded Compact.

However, Engadget’s Joanna Stern reported that the Eee Pads were “just not working” properly when demoed at the show.

“The EP121 wasn’t booting at all, but it was being shown off with a super sleek keyboard docking station, which will be used to turn the tablet into an ultraportable laptop of sorts. [And] an Nvidia Tegra-powered EP101TC was powering on, but its Windows Embedded Compact 7-based interface was still noticeably buggy, and the touchscreen quite unresponsive,” wrote Stern.

“The UI certainly looked attractive enough, and our swipe motions across the capacitive touchscreen were handled admirably, but ASUS definitely has a ways to go in terms of functionality…It looks as if we’ll have to wait for a less half-baked iteration to really dive in”