代码39的可能可用的解决方案打开注册表，
打开注册表regedit，
定位到HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\
根据下面的GUID，找到对应的设备，
根据下面的GUID，找到对应的设备，
根据下面的GUID，找到对应的设备，
[td]
常用硬件设备GUID |
| Class | GUID | Device Description |
| CDROM | 4D36E965-E325-11CE-BFC1-08002BE10318 | CD/DVD/Blu-ray drives |
| DiskDrive | 4D36E967-E325-11CE-BFC1-08002BE10318 | Hard drives |
| Display | 4D36E968-E325-11CE-BFC1-08002BE10318 | Video adapters |
| FDC | 4D36E969-E325-11CE-BFC1-08002BE10318 | Floppy controllers |
| FloppyDisk | 4D36E980-E325-11CE-BFC1-08002BE10318 | Floppy drives |
| HDC | 4D36E96A-E325-11CE-BFC1-08002BE10318 | Hard drive controllers |
| HIDClass | 745A17A0-74D3-11D0-B6FE-00A0C90F57DA | Some USB devices |
| 1394 | 6BDD1FC1-810F-11D0-BEC7-08002BE2092F | IEEE 1394 host controller |
| Image | 6BDD1FC6-810F-11D0-BEC7-08002BE2092F | Cameras and scanners |
| Keyboard | 4D36E96B-E325-11CE-BFC1-08002BE10318 | Keyboards |
| Modem | 4D36E96D-E325-11CE-BFC1-08002BE10318 | Modems |
| Mouse | 4D36E96F-E325-11CE-BFC1-08002BE10318 | Mice and pointing devices |
| Media | 4D36E96C-E325-11CE-BFC1-08002BE10318 | Audio and video devices |
| Net | 4D36E972-E325-11CE-BFC1-08002BE10318 | Network adapters |
| Ports | 4D36E978-E325-11CE-BFC1-08002BE10318 | Serial and parallel ports |
| SCSIAdapter | 4D36E97B-E325-11CE-BFC1-08002BE10318 | SCSI and RAID controllers |
| System | 4D36E97D-E325-11CE-BFC1-08002BE10318 | System buses, bridges, etc. |
| USB | 36FC9E60-C465-11CF-8056-444553540000 | USB host controllers and hubs |
| 常用硬件设备GUIDClassGUIDDevice DescriptionCDROM4D36E965-E325-11CE-BFC1-08002BE10318CD/DVD/Blu-ray drivesDiskDrive4D36E967-E325-11CE-BFC1-08002BE10318Hard drivesDisplay4D36E968-E325-11CE-BFC1-08002BE10318Video adaptersFDC4D36E969-E325-11CE-BFC1-08002BE10318Floppy controllersFloppyDisk4D36E980-E325-11CE-BFC1-08002BE10318Floppy drivesHDC4D36E96A-E325-11CE-BFC1-08002BE10318Hard drive controllersHIDClass745A17A0-74D3-11D0-B6FE-00A0C90F57DASome USB devices13946BDD1FC1-810F-11D0-BEC7-08002BE2092FIEEE 1394 host controllerImage6BDD1FC6-810F-11D0-BEC7-08002BE2092FCameras and scannersKeyboard4D36E96B-E325-11CE-BFC1-08002BE10318KeyboardsModem4D36E96D-E325-11CE-BFC1-08002BE10318ModemsMouse4D36E96F-E325-11CE-BFC1-08002BE10318Mice and pointing devicesMedia4D36E96C-E325-11CE-BFC1-08002BE10318Audio and video devicesNet4D36E972-E325-11CE-BFC1-08002BE10318Network adaptersPorts4D36E978-E325-11CE-BFC1-08002BE10318Serial and parallel portsSCSIAdapter4D36E97B-E325-11CE-BFC1-08002BE10318SCSI and RAID controllersSystem4D36E97D-E325-11CE-BFC1-08002BE10318System buses, bridges, etc.USB36FC9E60-C465-11CF-8056-444553540000USB host controllers and hubs |
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最后说一次，这里是以键盘（keyboard）为例，
例如键盘代码39，
例如键盘代码39，
例如键盘代码39，
就是HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96B-E325-11CE-BFC1-08002BE10318}
然后删除UpperFilters项或“lowerfilter”项，
再重启电脑。
案例参考，键盘代码39的步骤可能比其他多一步。
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