我已经把windbg和虚拟机上连上，我把系统的符号（我在网上下载回来的）都装在C:\Windows\Symbols文件夹下，然后在"File Symbol Path"下也选择了C:\windows\Symbols路径，之后就选择reload，选择OK，就显示如下等的错误：
*** ERROR: Symbol file could not be found. Defaulted to export symbols for USBD.SYS -
*** ERROR: Module load completed but symbols could not be loaded for Fs_Rec.SYS
*** ERROR: Module load completed but symbols could not be loaded for Beep.SYS
*** ERROR: Module load completed but symbols could not be loaded for mnmdd.SYS
*** ERROR: Module load completed but symbols could not be loaded for RDPCDD.sys
*** ERROR: Symbol file could not be found. Defaulted to export symbols for dump_WMILIB.SYS -
*** ERROR: Module load completed but symbols could not be loaded for ParVdm.SYS
*** ERROR: Symbol file could not be found. Defaulted to export symbols for dxgthk.sys -
*** ERROR: Module load completed but symbols could not be loaded for audstub.sys
*** ERROR: Module load completed but symbols could not be loaded for Null.SYS
请问是哪的错误呢？还有输入如:!process、!Thread、!cpuinfo等命令都有错误，
如 kd>!process则显示：NT symbols are incorrect, please fix symbols
kd>!Thread则显示：80552920: Unable to get thread contents
………………
