1. First, you need to download and install the driver to the Win7 computer's official website. After that, uninstall the Win7 computer's keyboard and re-install it.
2. After logging in to the Win7 system, press the Win+R shortcut on the keyboard to open the running window of the computer. Then, type regedit in the running window and click Enter to open Win7. The registry editor window of the computer.
3. In the window that opens, click to expand HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass{4D36E96B-E325-11CE-BFC1-08002BE10318} in the menu menu on the left. In the window that opens, in addition to the UpperFilters item, uninstall the device and restart Start your own win7 system.
4. After that, locate the HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass{4D36E96B-E325-11CE-BFC1-08002BE10318} in the Registry Editor window on the Win7 computer again, double-click the string UpperFilters and change the content to kbdclass. Click OK to save.
5. Finally, uninstall the device and reboot.
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