Microsoft Windows

In the wake of the browser choice screen in Europe, Opera Software is reporting a dramatic uptick in browser downloads. The company said more than half the European downloads of Opera 10.50 have come directly from Microsoft's choice screen since early March.

Microsoft used to configure Internet Explorer as the default browser for its Windows operating system, but under pressure from the European Commission, it agreed last October to test-market measures to give Europeans an option to download and install competing browsers like Opera, Google's Chrome and Mozilla's Firefox.

Microsoft released a software update Thursday that eliminates some of the hardware requirements for running Windows XP Mode on Windows 7 PCs. The goal is to make it far easier for small and midsize businesses to migrate to Windows 7 while retaining access to critical legacy applications that are unable to run on machines equipped with Microsoft's latest operating system.

Microsoft isn't going to let Apple have all the app-store fun. On Monday, the software giant announced more details about Windows Phone 7 Series applications in its online store as it moves to get third-party developers excited about the new platform.

Sure, Windows 7 has garnered plenty of accolades since its release. But that doesn't mean that people haven't been annoyed at some of its new or unexpected behavior. The good news is that most of what ails Windows 7 can be remedied with a little know-how or an add-on program here or there. Read on to find out more.

Q: Where is Windows Movie Maker in Windows 7? I relied on this program in Windows Vista.

With its mind in the clouds and an eye on rival Microsoft, Google on Tuesday launched an online application store for third-party programs that can be integrated with its online Google Apps office suite, with a single log-in and Google's universal navigation. The programs can sync with Gmail and Google's calendar, and use document-sharing features.

With the stakes high in Microsoft's bid to add its search engine to the iPhone, a few words of praise by the software giant's CEO have drawn a considerable amount of attention.

"Apple's done a very nice job that allows people to monetize and commercialize their intellectual property" in the App Store, Microsoft CEO Steve Ballmer told a University of Washington audience last week.

Playing Bing-o

Some Windows PC users may hope the Energizer bunny didn't keep going and going. It turns out the Energizer DUO USB battery charger is a vehicle for attacks on PCs, according to the Department of Homeland Security's Computer Emergency Readiness Team.

US-CERT researchers said Friday that the software that installs with the Energizer charger contains a Trojan horse that gives malicious hackers a back door into Windows machines.

Rivals of Microsoft's market-leading Web browser have attracted a flurry of interest since the company, fulfilling a regulatory requirement, started making it easier for European users of its Windows operating system to switch.

Microsoft Corp. has said its new software for smart phones, Windows Phone 7 series, is a "clean break" with the past. Now it's clear just how clean that break is: The new phones, expected late this year, won't run any applications written for older versions of Microsoft's phone software.

In a blog post Thursday, Microsoft executive Charlie Kindel, who handles contact with outside software developers, said that jettisoning support for older applications was necessary to make the new operating system as powerful and user-friendly as possible.

Apple is attempting to put the brakes on potential for one of the first Windows Phone 7 Series smartphones. Apple's suit against HTC would block the company from releasing its HD2 mobile phone equipped with Microsoft's new mobile operating system in the U.S.

Apple's complaint before the U.S. International Trade Commission would stop the Taiwan-based HTC from importing some of its 7 Series phones into the U.S.