Have you tried CypressDriverInstaller.exe available in the link: http://www.cypress.com/documentation/software-and-drivers/usb-serial-software-development-kit
Also, please try installing the driver automatically in device manager using Windows Update.
Thanks for your reply.
But link address you teach me is not available now.
And I already use installer "CypressDriverInstaller.exe 2015/3/13".
But this is not help for this problem.
Now I can add serial port.
Followings are procedure for add virtual com port with CY7C65123.
1)Run device manager
2)Other Devices --- ! Virtual Serial Port Device 00 << this is device install error item of cy7c65213. >>
3)Open property window of this error item
4)Driver update using "Browse my compuer for device software"
5)Select categoly PORT(COM & LPT)
6)Select cypress as company of production.
According to above seaquence , I can install serial com port.
Thanks a lot!
Worked for me too, thanks
Thank you k-negishi_1408021!