The newly bought Lenovo notebook v110 _14 IAP. After the system is changed to win7 system, the usb driver can't be installed. Ask god for advice.

Solution:

1. First, go back to the desktop location of win7 Ultimate PC. Then, locate the desktop computer icon and click E-mail. In the drop-down menu that appears, select the device manager option.

2. In the open device manager window of win7 Ultimate PC, find the USB device marked with exclamation mark in the left pane, then right-click and select Update Driver. Note that you can't choose automatic search here. You should choose to set the installation location, and then change the address to c:windowswinsxs in the file selection here.

3. After that, there will be an early warning prompt, that is, an unsigned file is installed. Choose to continue the installation and wait for it to complete.

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