My workplace wifi environment uses Cisco PEAP authentication and I am occasionally using my Lenovo ideapad S10-2 in the office.
The XP driver had no issues with that, I have been using it for some time. Recently, I upgraded the machine to Windows 7 32 Bit and realized that the current Wireless LAN driver from the Lenovo website does NOT offer Cisco PEAP as an option.
After quite some research, I found the latest driver for that Broadcom chipset (4315?) which is version 184.108.40.206. This driver is now working properly and I can connect to the WLAN again.