Washington - The Windows Explorer file manager is one of the most frequently used applications in Windows. That's no surprise, really, since files, after all, are what computers are all about. And you need a file manager to see, copy, delete, and move them. You'd think, then, that this most basic of tools could be easily customised to work the way people want. And you'd be right - up to a point. The trouble is that Windows Explorer has more than its share of quirks - even bugs. Getting around them is what this week's answers are all about.

San Francisco - YouTube began hosting its first full-length TV episodes Friday, accompanied with ads that were unusually intrusive for the Google-owned online video site.

The selection of reruns from CBS was less than impressive - five episodes each of Beverly Hills 90210, MacGyver, Star Trek: The Original Series, plus 14 episodes of The Young and The Restless.

But the move is seen as a first attempt by YouTube to become a major platform for showing advertising-supported TV shows over the internet.

Bangalore, Oct 10 : Chandrayaan I, India ''s spacecraft mission to moon will be launched on October 22 from the Satish Dhawan Space Centre in Sriharikotta.

The spacecraft has been fully integrated with all instruments and is presently under going final stages of tests at the launch complex.

ISRO Chairman Mr Madhavan Nair said the mating of the spacecraft with the launch vehicle and the satellite would take place on October 17.

London, October 10 : Google Earth’s new satellite, GeoEye-1, has provided a high resolution picture of Pennsylvania-based Kutztown University campus, which also happens to be its first picture.

The satellite took the picture on Tuesday when it was in a 423-mile-high orbit over the East Coast of the U. S.

"We expect the quality of the imagery to be even better as we continue the calibration activity," the Telegraph quoted Brad Peterson, GeoEye''s vice president of operations, as saying.

Washington, Oct 10 : A Northwestern University-led research team has identified a promising new material that could efficiently convert waste heat into electricity to help power cars and improve gas mileage.

The researchers discovered that adding two metals, antimony and lead, to the well-known semiconductor lead-telluride, produces a thermoelectric material that is more efficient at high temperatures than existing materials.

"We cannot explain this 100 percent, but it gives us a new mechanism - and probably new science - to focus on as we try to raise the efficiency of thermoelectrics," said Mercouri G. Kanatzidis, Charles E. and Emma H. Morrison Professor of Chemistry in the Weinberg College of Arts and Sciences.

London, Oct 10 : Data security worries could soon be an anxiety of the past, courtesy the world''s first computer network protected by unbreakable quantum encryption.

The EU-sponsored project (called SECO-QC) has been successfully demonstrated at a scientific conference in Vienna.

The network connects six locations across Vienna and in the nearby town of St Poelten, using 200 km of standard commercial fibre optic cables.

The kinds of security schemes used on computer networks today are typically based on complex mathematical procedures, which are extremely hard for outsiders to crack, but not impossible given sufficient computing resources or time.