I fixed it using the latest driver. Took me some time to search for it, but this one should work: www.dell.com/.../DriverDetails
Hi I have have a XPS L502X. I decided to make a clean installation based on Windows 7 Ultimate.My problem is when I instal the driver for the "Dell Wireless HSPA 5540" it fails with then warning: "Authentication failed. The .... driver cannot be installed on this computer...." Do anyone have an idea how to install driver for this ?   Thanks RegardsBQJ  
Authentication fail error when instaling driver