PL-2303 Drivers for Windows 7
Ken in Regina
Here are the Windows 7 PL-2303 USB-to-serial drivers from the Prolific site for anyone who needs them. <edit>Use the valid download link below.</edit>

Thanks to Geek&Sweet for posting this over on the forum.

Marvin Hlavac
This is the current version for Windows PC:

PL2303_Prolific_Driver About