Solutions to keyboard failures

Solve the Problem of keyboard failure I stayed idle in the dormitory last night, and recently caused the Win7 butler to report a virus threat, so I used the latest version of QQ manager to perform a full scan and kill... According to it, there are more than 60 dangers or viruses. Okay, clear them and restart them. The result shows that the password enters the Win7 stage and the keyboard does not respond... No password entered on the keyboard... The interface's soft keyboard couldn't be called, so I had to clear it with the password. after entering the system, I found that the keyboard could not be used. The keyboard icon in the Device Manager showed an exclamation point, which was speechless. I had to use a soft keyboard for typing, slow and troublesome ..... www.2cto.com boarded the damn CMCC-EDU, difficult to open the Baidu homepage, Baidu a bit later, find a solution, recorded in this. keyboard failure is actually caused by some viruses. To put it bluntly, the computer room has recently become popular with a very powerful virus. In my Win7, I will occupy 100% of the CPU. Why are there huge cards, it is also rare to know whether it is clean. If you don't want to bother yourself, pay attention when someone else's USB flash drive needs to be plugged into your computer (you can use the doscommand to open the USB flash drive, refer: http://www.bkjia.com/os/201210/164030.html ). Right-click my computer, right-click Properties-hardware-Device Manager, and you will be able to see the keyboard icon with an exclamation point. Double-click it to open it. If you find that "keyboard problem: due to its configuration information (in the Registry) windows cannot start the hardware device because it is incomplete or damaged. (Code 19) ", it means it is the same problem as I encountered. Www.2cto.com solution: (if you want to enter text during the operation, you can use the soft keyboard of the input method, click it) Start-run-Enter "regedit"-press enter to open the Registry regedit, go to HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Class \ {4D36E96B-E325-11CE-BFC1-08002BE10318}, delete the UpperFilters item, return to the Device Manager, uninstall the device, and restart. After the device is restarted, the Device Manager becomes: Code 10: the device cannot be started. Go to www.2cto.com and locate HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Class \ {4D36E96B-E325-11CE-BFC1-08002BE10318} to add the string UpperFilters. The content is that the kbdclass restarts the device. That's all!