If the folder is one that you customized using the Customize This Folder Wizard in Windows Explorer or a standard Windows customized folder (e.g., the Fonts folder), you might not be able to remove the read-only attribute or you might receive an error when you try to write a file to the folder. In either scenario, Windows is preventing you from writing to the folder because the OS is using the read-only flag to determine whether the folder is a system folder.

To work around this problem so that you can modify a folder's read-only status, you can tell Windows to use the system flag instead of the read-only flag to identify customized folders. To configure Windows to use the system flag, perform the following steps:
1. Start a registry editor (e.g., regedit.exe).
2. Navigate to the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer subkey.
3. Select New, DWORD Value from the Edit menu.
4. Enter a name of
UseSystemForSystemFolders
and press Enter.
5. Double-click the new value, set it to 1, and click OK.
6. Close the registry editor.
7. Reboot the machine for the changes to take effect.

How to disable Display Properties Tabs for security purpose?
1) Run registery editor, for this, type regedit in Run dialog box from start menu.
2) Find following address: HKEY-CURRENT-USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Policies \ System

3)Create a new DWORD (value of 1) and :
3-1) to disable ScreenSaver tab name it NoDispScrSavPage
3-2) to disable Desktop tab name it NoDispBackgroundPage
3-3) to disable Themes tab name it NoThemesTab
3-4) to disable Setting tab name it NoDispSettingsPage
3-5) to dsable Appearance and Themes tabs name it NoDispAppearance
3-6) to disable Display Properties name it NoDispCpl

NOTE: IT IS RECOMMENDED THAT CREATE A BACKUP FROM YOUR REGITERY OR SYSTEM RESTOR

Registry key berikut ini digunakan untuk memblok akses ke internet option tetapi cara ini hanya berlaku untuk browser Internet Explorer

Masuk ke regedit dan ketikkan
HKCU\Software\Microsoft\Windows\CurrentVersion\Group Policy
Objects\LocalUser\Software\Policies\Microsoft\Internet Explorer\ControlPanel

AdvancedTab = 1
ConnectionsTab = 1
ContentTab = 1
GeneralTab = 1
PrivacyTab = 1
ProgramsTab = 1
SecurityTab = 1

Dengan memasukkan angka 1 maka opsi tab yang tersedia otomatis akan hilang sehingga tidak bisa di utak-atik lagi. Untuk mengembalikannya ketikkan angka 0 maka akan kembali seperti semula.

Disable display propertis pada desktop berguna agar pengguna lain tidak seenaknya mengganti back ground pada desktop dan setting yang lain yang bisa dilakukan di display properties

Cara nya sebagai berikut
=> klik star
=> Run
=> ketik gpedit.msc
=> Muncul tampilan Group Policy
=> Masuk User Configuration
=> Adminstratif Templates
=> Control Panel
=> Display
=> Doble klik Remove display in control panel
=> Pilih enable
=> OK
Sekarang coba anda kembali ke desktop dan lakukan klik kanan=>properties maka hasilnya akan muncul tampilan Your System Administrator disable the display control Panel

SELESAI....