Configuring Windows 7 (Training Kit) - Part 24. This training kit is designed for IT professionals who operate in enterprise enviroments that use Windows 7 as a desktop operating system. You should have at least one year of experience in the IT field, as well as experience implementing and administering any Windows client operating system in a networked environment. | Viewing Bandwidth Allocations for a USB Host Controller Each USB controller has a fixed amount of bandwidth that all attached devices share. If you suspect a USB controller requires more bandwidth you can confirm this by viewing the bandwidth allocations currently being used by each device. In Device Manager double-click Universal Serial Bus Controllers right-click the Host Controller for your system and choose Properties. On the Advanced tab in the Bandwidth-Consuming Devices list view the bandwidth used by each device. Viewing Device Driver Information To view details about the device drivers that are running on your computer navigate to the device whose driver you are investigating right-click the device and choose Properties. On the Driver tab you can click Update Driver to update the driver Uninstall to remove it and Disable to disable the device. If the driver replaced a previously installed driver the Roll Back Driver button is also enabled. To obtain details about the driver click Driver Details. The Driver File Details dialog box appears as shown in Figure 4-6 with a list of the individual files that make up the driver file version information and digital signature information. FIGURE 4-6 Driver details Installing Devices and Managing Device Drivers PnP specifications define how a computer detects and configures newly added hardware and automatically installs the device driver. Windows 7 supports PnP so that when a user plugs in a hardware device the operating system searches for an appropriate device driver package automatically configuring it to work without interfering with other devices. This makes the installation straightforward. Lesson 1 Managing Device Drivers and Devices CHAPTER 4 203 However users cannot be permitted to plug any device they please into their work computers. Device driver software runs as if it is a part of the operating system with unrestricted access to the entire computer and only authorized device drivers can be permitted. .
