The Dell Wireless 370 Bluetooth card is a Broadcom card.

Install the Broadcom Bluetooth Update (Widcomm Windows Bluetooth Software):

http://www.broadcom.com/support/?gid=2

Can't speak specifically to the BT question but I've been running it on my E6420 since 07/29 and have had zero problems with the transition.  Configuring the privacy settings took longer than the upgrade process itself.  (It seems MS wants us to share everything but our hat sizes with the rest of the world.)

No driver issues whatsoever with my configuration - everything worked from the first boot.

The broadcomm USH is not bluetooth software its the Control point software package.

http://www.dell.com/support/article/us/en/19/SLN129590/en

The Broadcom Unified Security Hub USH drivers are included in the Dell ControlPoint Security Device Driver Pack, these drivers are located in the ControlPoint download category for your computer.

It also includes drivers for:
Broadcom Trusted Platform Module
Atmel Trusted Platform Module
STMicroelectronics Trusted Platform Module
Winbond Trusted Platform Module
O2Micro Smart Card Reader
Dell Smart Card Keyboard
UPEK TouchChip Fingerprint Reader
Authentec Fingerprint Reader
Vista Storage Driver Update (for ATAPI.SYS)

http://www.dell.com/support/home/us/en/04/Drivers/DriversDetails?driverid=V3P97

Latitude XT2 (Early 2009)
Latitude E6400 (Mid 2008)
OptiPlex 380 (Late 2009)
Latitude E4310 (Mid 2010)
Latitude E6410 (Early 2010)
Latitude E6410 ATG (Early 2010)
Latitude E5510 (Mid 2010)
OptiPlex 580 (Early 2010)
Latitude E5410 (Mid 2010)
Latitude E6510 (Early 2010)
Precision M4500
Precision T3500 (Early 2009)
OptiPlex XE (Early 2010)
OptiPlex 980 (Early 2010)
Precision M6500
Latitude 13 (Mid 2010)
Latitude E6400 ATG (Mid 2008)
OptiPlex 760 (Late 2008)
Latitude E4300 (Late 2008)
Latitude E6500 (Mid 2008)
OptiPlex 780 (Late 2009)
Precision M2400
Precision M4400
Precision M6400
Latitude E5500
Latitude E5400 (Mid 2008)
OptiPlex 960 (Late 2008)
Latitude E4200 (Late 2008)
Precision T7500 (Early 2009)
Precision T5500 (Early 2009)
Latitude E6400 XFR (Mid 2008)
Latitude Z (Late 2009)
Latitude XT2 XFR (Late 2009)

Hi,

That did resolve my problem. Now my Credential Vault is working.

Thanks a lot.

Teo

Hi,

I have upgraded two e6400 from Win7 Pro to Windows 10 Pro. One has Nvidia video the other Intel.

Both have 4 Gig Ram & 500gb HD.

I did have to reinstall the Dell Webcam Central Program & Mouse Pad Drivers.

Blue Tooth was the only driver I needed to source from another supplier.

The Broadcom Blue Win 10 Blue Tooth drivers from Lenovo work. Do a google search and they will get your Bluetooth adaptor up and working.

Lastly you can get Win 10 Nvidia Quartro drivers direct from Nvidia.

Both laptops work well and pass the Dell Standard, Extended & Stress Test fine.

Device Manager showed not a single unknown device. I mean I should have seen the Bluetooth device as a not installed device on Device Manager.

I did as you wrote, It simply worked ! (tried many solution available on the internet for about 3 hours !)

Thanks !

I don't have any information on bluetooth, but I am trying to install Win 10 on a Dell Latitude E6400 and keep getting a message that the CPU is not compatible with Win 10 and that NX must be enabled in BIOS. From what I have been able to find out NX is a security option on AMD computers and Intel has an equivalent called XD which I have enabled but I still get the same error.

Did you encounter this when you installed Win 10 and do you have any suggestions?

That model is not supported by Dell for win 10 since there are no win 10 drivers available. It would be best to stick with the OS you have now and get windows 10 on your next computer. That model is 6 years old so you are due for a new laptop.

Just a few questions for you so I can give you the best advice. 1/. What is the model number of your CPU? Are you doing a Win 10 upgrade from Win 7 (Service pack 1 installed) or Windows 8 or 8.1?

The two Dell Latitude e6400 I upgraded where running a clean install of Win 7 Pro (64bit) with all Dell drivers installed. Win 10 keeps drivers it needs from the previous OS instillation. I had to install Touch Pad Drivers & Blue Tooth Drivers as per my previous post.

If you have the Nvidia Video Graphics option then you can get the driver from Nvidia.

On the Latitude e5400 Win 10 didn't recognize the Intel Graphics however from Device Manager I simply choose update drivers and it found the drivers on the net so no problems.

Most Win 10 upgrade problems come from a corruption of the present OS instillation and that is why I backup my personal data and do a clean install of the OS, Drivers & programs; then the Win 10 upgrade and have had no failures yet.