Windows disk cleanup utility frees the memory space occupied by the unwanted files that can be deleted. When you start the disk cleanup program it scans the Hard Disk drive and identifies the files and programs that can be deleted safely. It calculates the disk space occupied by unnecessary file and displays a list of files that you can choose to remove them from the system.

How to run Windows Disk cleanup Utility Program:

Go to My Computer and right click on C: drive and click on properties.
It will display the following:

Click the Disk Cleanup Button below the Capacity graph of C: drive. It will start scanning the files to generate the list of identified files that can be removed safely.

After completing the scanning process it will display the following Disk Cleanup Checkbox list:

You can use the Disk cleanup program to remove the following types of files:

1. Downloaded Program Files
   It consists of the downloaded ActiveX controls and Java applets temporarily stored in the Downloaded Program files of Windows Folder.
   Path: X:\WINDOWS\Downloaded Program Files
   
   
   
2. Temporary Internet Files
   This folder contains the copy of web pages you view during daily web browsing. Temporary Internet Files are utilized by the Windows OS for quick viewing the web history. It contains all the web pages, images, flash files and cookies etc.
   
   
   
3. Offline Web Pages
   Offline Web pages contain the web pages saved to be viewed later offline. You can synchronize these pages later for retrieving the latest version of web pages.
   
   
   
4. Microsoft Error Reporting Temporary File
   
   
   
5. Office Setup Files
   
   
   
6. Recycle Bin
   
   
   
7. Setup Log Files
   
   
   
8. Temporary Files
   
   
   
9. Offline Files
   
   
   
10. Catalog Files for Content Indexer

You can choose the checkboxes to remove the unnecessary files from the computer system memory and click OK to complete the Disk Cleanup.