Problems in Windows Vista while working in wireless network

Problem:
If you try to use computer authentication and user authentication to switch the client computer to different VLANs. However, the client computer does not obtain the correct IP address during VLAN switching.

If different vendors provide more than one EAP method, the EAP method that is displayed in a wireless profile is not the EAP method that is actually selected.

A wireless profile that an independent hardware vendor (IHV) provides may be corrupted after you use the wireless profile user interface to edit the profile. When this problem occurs, you may receive an error message that Windows Explorer has crashed

Every time that you roam to a different wireless access point, you are prompted to provide a user credential. This problem occurs even if you have saved the user credential.

You registered a Protected Extensible Authentication Protocol (PEAP) method that the IHV provided. When you try to authenticate against an Internet Authentication Service (IAS) server, the server may reject the authentication, and the IAS server may send an error message that the authentication has failed. The Onex.dll file crashes when this problem occurs

Solution: Microsoft has introduced supported hotfix to solve these problems just follow the link below for the resolution

link to Problems in Windows Vista