Dear Triary,
1. Coba anda desable via Group Policy (GPO). Anda ketik ulang atau copy paste ke notepad kemudian save dengan extension ".adm"
CLASS MACHINE
CATEGORY !!category
CATEGORY !!categoryname
POLICY !!policynameusb
KEYNAME
"SYSTEM\CurrentControlSet\Services\USBSTOR"
EXPLAIN
!!explaintextusb
PART !!labeltextusb DROPDOWNLIST REQUIRED
VALUENAME "Start"
ITEMLIST
NAME !!Disabled VALUE
NUMERIC 3 DEFAULT
NAME !!Enabled VALUE NUMERIC 4
END ITEMLIST
END PART
END POLICY
POLICY
!!policynamecd
KEYNAME "SYSTEM\CurrentControlSet\Services\Cdrom"
EXPLAIN !!explaintextcd
PART !!labeltextcd DROPDOWNLIST
REQUIRED
VALUENAME "Start"
ITEMLIST
NAME !!Disabled VALUE NUMERIC 1 DEFAULT
NAME !!Enabled VALUE
NUMERIC 4
END ITEMLIST
END PART
END POLICY
POLICY !!policynameflpy
KEYNAME
"SYSTEM\CurrentControlSet\Services\Flpydisk"
EXPLAIN
!!explaintextflpy
PART !!labeltextflpy DROPDOWNLIST REQUIRED
VALUENAME "Start"
ITEMLIST
NAME !!Disabled VALUE
NUMERIC 3 DEFAULT
NAME !!Enabled VALUE NUMERIC 4
END ITEMLIST
END PART
END POLICY
POLICY
!!policynamels120
KEYNAME
"SYSTEM\CurrentControlSet\Services\Sfloppy"
EXPLAIN
!!explaintextls120
PART !!labeltextls120 DROPDOWNLIST REQUIRED
VALUENAME "Start"
ITEMLIST
NAME !!Disabled VALUE
NUMERIC 3 DEFAULT
NAME !!Enabled VALUE NUMERIC 4
END ITEMLIST
END PART
END POLICY
END CATEGORY
END
CATEGORY
[strings]
category="Custom Policy Settings"
categoryname="Restrict
Drives"
policynameusb="Disable USB"
policynamecd="Disable CD-ROM"
policynameflpy="Disable
Floppy"
policynamels120="Disable High Capacity Floppy"
explaintextusb="Disables
the computers USB ports by disabling the usbstor.sys driver"
explaintextcd="Disables
the computers CD-ROM Drive by disabling the cdrom.sys driver"
explaintextflpy="Disables
the computers Floppy Drive by disabling the flpydisk.sys driver"
explaintextls120="Disables
the computers High Capacity Floppy Drive by disabling the sfloppy.sys
driver"
labeltextusb="Disable USB Ports"
labeltextcd="Disable
CD-ROM Drive"
labeltextflpy="Disable Floppy Drive"
labeltextls120="Disable
High Capacity Floppy Drive"
Enabled="Enabled"
Disabled="Disabled"
2. Import file tersebut kedalam GPO dengan cara buka menu administratif
tools, group policy Managemen, pilih default domain control, click kanan
pada menu popup yang mencul pilih edit.
3. Pada windows popup yang muncul (Group Policy Object Editor), pilih
Computer Configuration, Administrative Templates, click kanan, pilih
Add/Remove Templates, insert adm filenya dengan cara click Add, pilih
file admnya.

4. Hasilnya akan ada tambahan Custom Policy Setting pada
Administrative Templates
5. Pilih menu view pada windows Group Policy Object Editor, Click
Filtering dan hilangkan tanda centang pada Only Show Policy Setting Than
can be Fully Managed.
6. Lihat pada Restric Drive pada Custom Policy Setting, dan Tinggal
aktivkan disable USB dll

GPO ini hanya akan mendisable fungsi USB Storage, sedangkan fasilitas
USB yang lain seperti Mouse, Keyboard, Printer tetap bisa jalan dengan
normal, kecuali Camera Digital karena di anggab sebagai USB Storage.
Selamat mencoba.
Regards,
NeoS.
Referensi :
http://support.microsoft.com/kb/555324
http://nanangars.wordpress.com/2008/10/22/disable-usb-flash-disk