First, set the CMOS parameters
For a friend who has never used a USB add-in, it is possible that the system cannot detect a USB hard drive even if the driver is properly installed, mainly because the default CMOS port on the motherboard is turned off, and if it is not set to open, Then Windows naturally cannot detect the removable hard drive. To solve this problem, we can reboot, enter the CMOS Setup window, and in the "Pnp/pci CONFIGURATION" column, "Assign IRQ for USB" is set to "Enable", This allows the system to assign an available interrupt address to the USB port.
Second, the power supply is insufficient
Because the USB hard disk in the work also need to consume a certain amount of electricity, if directly through the USB interface to take electricity, it is likely to appear power supply. As a result, almost all mobile drives come with a separate external power supply or a PS2-turn interface that is powered by a keyboard. At this time as long as the prior connection to the external power supply or through the PS2 to connect with the keyboard, to ensure that the mobile hard disk to provide enough power after the test, then should be normal use of it. It is important to note that it is recommended that you make sure that you have enough power before using a removable hard drive, or you may be damaged by a lack of power.
Third, USB extension cord failure
In addition to the above two reasons, it is possible that the USB interface type does not match the removable hard drive. For example, the computer configured USB interface is 1.1 standard, and the purchase of the mobile hard disk is the USB 2.0 standard interface, which requires connecting the computer and mobile hard drive connector must support the USB 2.0 standard. Because a high-speed mobile device is plugged into a low-speed hub, the device may not be installed properly, and some friends use a USB drive while using a mobile hard disk, which makes it easy to use the 1.1 standard connector that comes with the USB 2.0 standard, which results in the correct identification of the mobile hard drive. This failure can be resolved simply by replacing the connector with the USB 2.0 standard.
Four, the Windows version is too low
For some friends who are still using Windows 95 or Windows 97 systems, even if the computer is equipped with a USB interface, because the operating system before Windows 98 does not support USB peripherals, install the driver anyway, Setting the CMOS parameters does not allow the removable hard drive to work properly. One workaround for this situation is to upgrade the operating system to Windows 98, and the other way is to download the appropriate patch at Microsoft's official site to allow Windows 95/97 to recognize the removable hard drive.
V. Improper setup of the system
For some Windows 98 users, after the driver is installed, you can view the removable hard disk icon from Device Manager, but there is no corresponding letter identifier in the explorer, which is the result of improper system setup. Double-click the move hard drive icon in Device Manager and click on the pop-up window of the "Properties" button, you can see the disconnect, removable, synchronized data transfer and INT 13 unit four options, which "can be deleted" in front of the system default is not ticked, as long as the option to restart the computer, You can see the new mobile hard drive letter in the resource manager.
Word, the mobile hard disk can not identify the reasons for the failure of more, but generally not USB interface or the fault of the mobile hard disk itself, so we need to eliminate the time from the surrounding relevant part of the consideration, I believe you can also smooth use of mobile hard disk.
Other answers:
1: You have to put your XP operating system into a SP2 package to use USB2.0
2: Motherboard support for the installation of a random motherboard driver or download the same type of driver on the Internet, but the system must be WIN2000 SP4 or WinXP SP1 above, WIN 2003, other systems do not support.
When Windows XP users are playing the game, suddenly the mouse can not move, and then the user will change the mouse to a USB interface after a while can not move. What the hell is going on? This illusion can be repaired in the following way.
Operation Steps
1, right click on "My Computer" select "Properties".
2, then select hardware → Device Manager in System Properties.
3, at this time the Device Manager pop-up "Universal Serial Bus Controller" under the "USB Root Hub" right Button "properties."
4, finally in the "USB Root Hub Properties" bar to "allow the computer to turn off this device to save power" to remove the hook press "OK".
