What you need:
Windows Vista, Windows 7 (32-bit or 64-bit) or Windows 8
Basic requirements:
1 GHz
512 MB RAM or more
200 MB hard drive space
Internet connection
USB 1.1 port (2.0 recommended)

For HD 720p video calling and HD video recording:
2.4 GHz Intel Core2 Duo
2 GB RAM
200 MB hard drive space
USB 2.0 port
1 Mbps upload speed or higher
1280 x 720 screen resolution