usb不能識別問題

    今天遇到一個問題就是全部usb設備都不能識別，用鍵盤操做麻煩就用了mstsc遠程鏈接到有問題的機器上操做。

1.起初開始菜單運行中devmgmt.msc看到設備管理器都是好的，從新掃描設備仍是不行，後來更新usb驅動重啓仍是不行，bios中檢查usb設備enable的，默認bios重啓仍是不行，f8安全模式仍是不行。檢查usb口插到後面usb仍是不行，換好的鼠標仍是不行。
2.這下能夠判斷能夠能是usbstor註冊表有問題。
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentCntrolSet\Services\USBSTOR] 的問題從本身的xp系統導出usbstor鍵值

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR]
"Type"=dword:00000001
"Start"=dword:00000003
"ErrorControl"=dword:00000001
"ImagePath"=hex(2):73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,44,00,\
  52,00,49,00,56,00,45,00,52,00,53,00,5c,00,55,00,53,00,42,00,53,00,54,00,4f,\
  00,52,00,2e,00,53,00,59,00,53,00,00,00
"DisplayName"="USB 大容量存儲設備"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR\Security]
"Security"=hex:01,00,14,80,90,00,00,00,9c,00,00,00,14,00,00,00,30,00,00,00,02,\
  00,1c,00,01,00,00,00,02,80,14,00,ff,01,0f,00,01,01,00,00,00,00,00,01,00,00,\
  00,00,02,00,60,00,04,00,00,00,00,00,14,00,fd,01,02,00,01,01,00,00,00,00,00,\
  05,12,00,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,\
  20,02,00,00,00,00,14,00,8d,01,02,00,01,01,00,00,00,00,00,05,0b,00,00,00,00,\
  00,18,00,fd,01,02,00,01,02,00,00,00,00,00,05,20,00,00,00,23,02,00,00,01,01,\
  00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00
 

3.剛開始刪除不了有問題的xp機器的usbstor鍵值，後來去安全模式刪除不了，後來用軟件刪除不了，後來設備管理器停用usb設備仍是不行，後來檢查了usbstor的權限打上everyone徹底控制就能夠把整個usbstor刪除掉，而後倒入好的xp的usbstore.reg就能夠了，而後從新啓動。usb有能夠用了。