How to solve the win7 card reader can not open

                                                                                                                                                                                         

For users who use computers
, we should know that when we use computer
, we often use mobile devices including U disk and mobile hard disk. However, sometimes we may also read the phone memory card or camera memory card through the card reader. However, users of the Win7 system have reported that when they used the card reader recently, there was a situation in which the card reader could not read the card. What happened to this situation? Here, let Xiaobian come for everyone. Introduce the specific solution that Win7 computer card reader can't read.

The solution is as follows:

1, then click [Start - Control Panel - Add New Hardware - Find] on the original computer and then find out if there is any external device, if any, you can open it and click [ Hardware] Unload the driver, then insert the card reader and reinstall the driver.

2, of course, you can enter the safe mode, and then repair the registry, and then re-enter the normal mode to plug and unplug the card reader, view the fault
time to solve.

3, if the fault is still the same, then try to restore the computer to the time when there is no fault, or repair the system disk, open a command prompt and enter SFC /SCANNOW Enter, then insert the system disk repair. There is no need for us to fix it, the system will automatically detect the repair.

4. If the fault persists, set the CD-ROM drive in the BIOS to insert the system boot disk into the system installation disk and press R to select “fix installation”

5, caused by insufficient USB power supply. This situation may be caused by too many external devices on the usb interface.

Workaround: Right click [My Computer - Device Manager - find the "Universal Serial Bus Controller" option, then have some "usb Root Hub" option on the drop down list of this option ], as shown:

Double-click this option, then open the Properties dialog, switch to the "Power Management" tab, remove "Allow Computer
to turn off this device to save Check the box before the power supply and click OK.

About the above Win7 computer card reader can not read the solution is finished, in fact, there are many reasons why the card reader can not read, but we can solve it by the exclusion method, first look at whether it is not The problem with the card reader, if it is a problem with the card reader, then bought a new one.