Lenovo ThinkPad T400s series User Manual page 30

7. Click Install to begin installation.
8. Click OK to accept the driver signature.
9. Click Finish.
10. Restart the computer if necessary.
If you did not turn the Bluetooth power on before installing ThinkPad Bluetooth with Enhanced Data Rate Software--that is, if you skipped step
1--replace the Bluetooth driver, as follows:
1. Click Start-->Control Panel.
2. Click Performance and Maintenance; then click System.
3. Click the Hardware tab; then click Device Manager.
4. Double-click Bluetooth Radios to extract the Bluetooth Radios device tree.
5. Double-click the ThinkPad Bluetooth with Enhanced Data Rate icon to open the Properties window.
6. Click the Driver tab; then click Update Driver.
7. Click No, not this time, and then click Next.
8. Select Install from a list or specific location (Advanced), and then click Next.
9. Select Don't search. I will choose the driver to install; then click Next.
10. Select the driver that has no "Digital Signed" icon; then click Next.
11. Click Finish.
Note: If you use the wireless feature (the 802.11 standard) of your computer simultaneously with a Bluetooth option, data transmission
speed can be delayed and the performance of the wireless feature can be degraded.