You need the Win7 camera driver, check sony support at:
http://esupport.sony.com/US/perl/swu-list.pl?mdl=VGNCR220E&SelectOS=44just enter your Win7 operating system (there are 9 versions of Win7), and select the downloads (2)
for your computer camera driver.
Versions of microsoft Win7 - determine which yours is by (these instructions are for WinXP);
START > Control Panel > System > General (tab)
Windows 7 Home Basic 32-bit
Windows 7 Home Basic 64-bit
Windows 7 Home Premium 32-bit
Windows 7 Home Premium 64-bit
Windows 7 Professional 32-bit
Windows 7 Professional 64-bit
Windows 7 Starter 32-bit
Windows 7 Ultimate 32-bit
Windows 7 Ultimate 64-bit