Implementing, Managing, and Troubleshooting Input/Output Devices and Drivers Watch for questions requiring users to start applications with administrative or another user's rights. The correct answer is to use Run As. You can opt to use the command prompt by typing the command runas /user:Computername\username "drive:\folderpath\app.exe", or you can right-click any application while holding the Shift key and select Run As from the context menu. The System Information utility, which can be opened by typing msinfo32 in the Run dialog box or from the command line, provides a quick view of any resource conflicts. When you are in the utility, click Hardware Resources and then click Conflicts/Sharing. In Device Manager, you can click the Driver tab to update the driver, roll back the driver to a prior version, remove the driver, and troubleshoot the device. A jumpy mouse pointer indicates a mouse driver problem or video device driver error. Configure mouse settings in the Control Panel Mouse applet. Configure keyboard settings in the Control Panel Keyboards applet. Scanners and digital cameras use similar processes for transmitting digital media to the computer. Multilink is a method of aggregating the bandwidth of multiple modem connections, using Point-to-Point Protocol (PPP). Serial Line Internet Protocol (SLIP) is for Unix connections. It does not support the advanced functions or multiple protocols that PPP supports. Universal serial bus (USB) allows up to five USB hubs to be connected in a chain. If you have too many hubs, you will trigger an error condition. If you install a device, Windows XP looks for the driver signature, as a part of System File Protection. When it fails to find one, Windows XP notifies you that the drivers are not signed as part of its default configuration. You can change this behavior to always allow installation, or to always block unsigned drivers. If you want to use ACPI but have the incorrect HAL installed, you must reinstall Windows XP. However, this does not apply to upgrading a single processor to a multiprocessor computer. You can change the HAL by updating the driver for the computer in Device Manager. Table 12 describes HAL files and the computers on which they function.
Table 12. HAL File OptionsHAL File Name | PCs on Which This Will Function |
|---|
Hal.dll | Standard single processor PC, non-ACPI | Halapic.dll | Standard single processor PC, non-ACPI
MPS single processor PC, non-ACPI
MPS multiprocessor PC, non-ACPI | Halmps.dll | Standard single processor PC, non-ACPI
MPS multiprocessor PC, non-ACPI | Halacpi.dll | Standard PC, non-ACPI
ACPI PC | Halaacpi.dll | Standard PC, non-ACPI
ACPI PC
ACPI single processor PC
ACPI multiprocessor PC | Halmacpi.dll | Standard PC, non-ACPI
ACPI PC
ACPI multiprocessor PC
MPS multiprocessor PC, non-ACPI |
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