Download: Skype 4.2.0.155 for Windows

Skype is software that enables you to make free calls anywhere in the world. Skype uses P2P (peer-to-peer) technology to connect you with other users. It offers several features, including SkypeOut calling from Skype to regular and mobile phones worldwide, conference calling, and secure file transferring. You can also now share your screen with other users. Skype calls focus on video and audio quality, and secure the calls with end-to-end encryption.

Additionally it doesn't just work on Windows. Skype is also for Mac OS X, Linux and PDAs using Pocket PC, with a native look and feel for each platform. Talking, sending instant messages or even file transfers work between different platforms like a charm.

Main features
• Free Skype-to-Skype calling
• Free video calls
• Free instant messaging.
• Call phones and mobiles, send SMS.
• Voicemail
• Forward calls to a phone when you’re offline.

What's new in Skype 4.2.0.155
Fixed issues:
- Payments: It was not possible to make payments with a credit card that had not been previously used for any Skype purchases.
- Installation: Skype crashed for some users after installation.
- Security: Fixed Skype URI handler security vulnerability.

Download Skype
Download Skype 4.2.0.155 for Windows form website Download Skype 4.2.0.155 for Windows

System requirements
- PC running Windows® 2000, XP, Vista or 7, both 32- and 64-bit operating systems. (Windows 2000 users require DirectX 9.0 for video calls).
- Internet connection – broadband is best (GPRS is not supported for voice calls).
- Speakers and microphone – built-in or separate.
- For voice and video calls we recommend a computer with at least a 1GHz processor, 256 MB RAM and of course a webcam.
- For High Definition (HD) video calls both you and the person you're talking to need Skype 4.2 for Windows or higher, plus HD webcams. You'll also need a high-speed broadband connection (Recommend sustained 1 Mbps symmetrical bandwidth or higher) and a PC with at least a 1.8 GHz processor.

Source:
• Download Skype for Windows
• Skype Release Notes