i want deny access some partition for some users or groups without using program.for example with Windows Registryplz help meattention to i dont want to use any program for this workthnx1 person needs an answerI do too

It's unclear to me whether you just want to keep some information stored on that partition private or not. You forgot to say whether this is a home or corporate machine and what version of XP you're running. Make sure you don't deny access to a system partition or you will have unintended, unpleasant results. In any case, you need to do set restrictions with permissions. XP does not use passwords to protect resources. NT-based operating systems use permissions instead. Here is information to help you with that: How to disable Simple Sharing and set permissions on a shared folder in Windows XP (Pro only) http://support.microsoft.com/?kbid=307874 How to configure file sharing in Windows XP (includes information about permissions): http://support.microsoft.com/kb/304040 By default in XP Home, you can only make files and folders under My Documents "private". Otherwise, to see the security tab in WinXP Home, restart in Safe mode and log on with an account that has administrator privileges. To get into Safe Mode, repeatedly tap the F8 key as the computer is starting up. This will get you to the menu where you can choose Safe Mode. Note that the file system must be NTFS, not FAT32. Passwording of folders is not supported unless you zip them. When you do (right click a folder, then "send to > compressed folder") and then open the zip file, you will find an option under file>"add a password". Otherwise, use third-party software. Google "password protect folders". And I'm sorry but you would need to use a third-party program for that. If you have XP Pro or Media Center you can use Group Policy to set restrictions (gpedit.msc). Be very careful using the Group Policy editor; it is completely possible to lock yourself out. Questions about group policy should be posted here: microsoft.public.windows.group_policy Or in one of the TechNet forums - http://social.technet.microsoft.com/Forums/en/categories/ If you have XP Home, you don't have the built-in ability to create fine-grained limitations. In XP Home you can use either MVP Doug Knox's Security Console or the MS SteadyState program to set the restrictions the way you want. And again, sorry but these are additional programs. http://www.dougknox.com http://www.microsoft.com/windows/products/winfamily/sharedaccess/default.mspx More on SteadyState - http://aumha.net/viewtopic.php?t=27570 SteadyState support - http://social.microsoft.com/forums/en-US/windowssteadystate/threads/ SteadyState how-to (not supported in Windows 7 yet) - http://www.howtogeek.com/howto/6520/windows-steadystate/ MS-MVP - Elephant Boy Computers - Don't Panic!