PEAP-GTC on Win 7 and 8 platforms (LDAP authentication doesn't work)

Hi all!
Customer is using Open LDAP as directory services.
We're setting Cisco Wi-Fi network with following authentication scheme:
Wireless LAN Controller - Cisco ACS 5.3 - Open LDAP
According to the documents ACS - LDAP supports only EAP-TLS and PEAP-GTC methods.
We need to perform username/password authentication. It works good on Apple and Android devices. But id doesn't want to authenticate Windows 7 clients.
We're unchecking "Validate Servers certificate" in WLAN settings of Win 7 client, but it still doesn't work.
It seems, that Windows doesn't support PEAP-GTC method. Are there any workaround to solve the issue?
I might assume, that there could be some software plug-ins (supplicants) that can be installed on Windows and give support of PEAP-GTC. But in this case customer will face serious organizational issues of provisioning new devices.
Please advice!
Thank you!
Yuriy

In order to see PEAP EAP-GTC option on the client, you need to install EAP-GTC supplicant on the client machine.
Check this:
http://www.cisco.com/en/US/docs/wireless/technology/peap/technical/reference/PEAP_D.html#wp1007967
Jatin Katyal
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