The Group Policy Client service failed the logon. Access is denied.

Can not logon. Error message: The Group Policy Client service failed the logon. Access is denied.

Refer to -
http://support.microsoft.com/kb/947215

Find an un-used user account. Change it into the user name you have problem logging on.

The User Profile Service failed the logon. User profile cannot be loaded

http://support.microsoft.com/kb/947215

How to identify an unknown device (e.g. Wireless LAN module)?

http://web1.toshiba.ca/support/isg/drivers/Common/wireless/howto/index.htm