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File System Caching and Memory Settings
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Error Checking and Defragmentation Settings

Optimize Hard Disk when idle (Windows XP/.NET)
This setting will rearrange files on the hard drive when the computer is idle thus improving the performance of the system.

Change the Offline Files Synchronization Method (Windows 2000/XP)
This tweak determines whether the system performs a full or quick synchronization of offline files when the user logs off, and prevents users, including administrators, from changing the setting.

Do Not Move Deleted Files to the Recycle Bin (Windows XP)
When a file or folder is deleted in Windows Explorer, a copy of the file or folder is placed in the Recycle Bin. Using this setting, you can change this behavior.

Change the File Attribute for System Folders (Windows 95/98/Me/NT/2000)
Windows Explorer normally uses the Read-Only attribute to determine whether a folder is customized. This may cause file saving problems with some programs and not allow you to remove the attribute. This tweak allows you to force Windows to use the alternate System attribute.

Change the Default Disk Utilities (All Windows)
These settings control the default tools used for Windows disk management including Backup, Defrag, Repair and Cleanup. Changing these values will alter the programs used when you right-click a disk in My Computer and select Properties > Tools.

Windows NT Failure to Open Large Files (Windows NT)
When an application tries to open large files (over 100MB), the request may fail with one of the following error messages: Insufficient Resources or Invalid Handle. This tweak can be used to resolve the problem.

Change Copy and Move NTFS Permissions (Windows NT/2000/XP)
When you copy or move a file or folder to another volume, the object inherits the permissions of its new folder. This setting allows you to force Windows to preserve the current permissions instead.

Disable Encryption for Files Copied to a Server (Windows 2000)
This tweak allows you to prevent Encrypting File System (EFS) files from being copied to a server in an encrypted format. This provides the ability to share files on a central server in an unencrypted state.

Automatically Start CD-R and DVD-R Disks (All Windows)
This settings controls whether CD-R(W) and DVD-R(W) disks are automatically started when loaded into the computer.

Manage the Encrypting File System (Windows 2000/XP)
When you use Encrypting File System (EFS), you can store data securely because selected NTFS file system files and folders can be encrypted. This setting allows you to enable or disable EFS.

Select the Drive Types to Start Automatically (All Windows)
When using AutoRun Windows can detect and automatically start programs when new media is inserted into a drive. By default, CD-ROM and hard drives will automatically launch, but removable and network drives will not.

Enable 48-bit LBA Support for Large Hard Drives (Windows 2000/XP) Popular
By default Windows 2000 SP2, Windows XP and earlier versions of Windows do not support 48-bit Logical Block Addressing (LBA) for drives larger than 137GB as defined in the ATA/ATAPI 6.0 specification.

Enable Advanced File System and Sharing Security (Windows XP Professional) Popular
This setting is used to enable the ability to control advanced NTFS permissions on local and shared files.

Disable CD Burning (Windows XP) Popular
This restriction is used to disable the use of the inbuilt CD recording functions of Windows.

Disable the Recycle Bin (Windows 98/Me/2000/XP) Popular
This setting is used to disable the use of the recycle bin and permanently remove all deleted items instead. This enables the same functionality as holding the Shift key while deleting items.

Change Drive Name and Icon (All Windows) Popular
This tweak allows you to change the name and icon shown in Explorer for a specific drive letter.

Show File and Folder Names Using the Correct Case (Windows 95/98/Me/2000/XP) Popular
Some versions of Windows will attempt to adjust the capitalization of files and folders that are in all uppercase to make them more visually pleasing. For example, if you create a folder named "C:\ALLINCAPS" Windows will actually display it as "C:\Allincaps". This feature can be disabled using this tweak.

Configure Protected-Mode Hard Disk Interrupt Handling (Windows 95/98/Me)
This switch allows Windows to terminate interrupts from the hard disk controller, bypassing the ROM routine that handles these interrupts. Some hard drives might require that this setting be disabled in order for interrupts to be processed correctly. If this setting is disabled, the ROM routine handles the interrupts.

Configure New File Sharing and Locking Semantics (Windows 95/98/Me)
This setting controls the file locking mechanisms of Windows, disable this setting only if you are currently experiencing problems with specific applications.

Configure 32-bit Protected Mode IO Drivers (Windows 95/98/Me)
This setting controls whether fixed disk access is performed through Windows protected mode drivers or through real mode drivers and BIOS routines. If you are experiencing drive IO errors enabling this setting may be a possible solution.

Select the Disk Drives to Start Automatically (All Windows)
This setting controls which drives the AutoPlay feature is enabled on. When AutoRun is enabled, media is automatically started when it is inserted in the drive.

Disable the NTFS Last Access Time Stamp (Windows NT/2000/XP) Popular
When Windows accesses a directory on an NTFS volume, it updates the LastAccess time stamp on each directory it detects. Therefore, if there are a large number of directories, this can affect performance.