What should I do if the Win7 system card reader does not read?

The solution is as follows:

1. Click [Start - Control Panel - Add New Hardware - Search] on the original computer and find out if there is any external device. If there is any, you can open [Hardware]. The driver is unloaded, then the card reader is inserted and the driver is reinstalled.

2, of course, you can enter the safe mode, and then repair the registry, and then re-enter the normal mode to insert and remove the card reader, see the fault is resolved.

3, if the fault is still the same, then try to restore the computer to no failure, or repair the system disk, open a command prompt to enter SFC /SCANNOW Enter, and 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 first boot device, press R to select “ repair installation & rdquo;

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

Solution: Right mouse button [My Computer - Device Manager - find the "Universal Serial Bus Controller" option, then there are some "usb Root Hub" options on the drop-down list of this option. ], as shown:

Double-click this option, then open the Properties dialog box, switch to the "Power Management" tab, remove the "Allow the computer to turn off this device to save power" Select, click OK.