1. ANTI-VIRUS PROGRAM
1.1. protects a computer against viruses by identifying and removing any computer viruses found in memory,on storage media or incoming files
1.2. EXAMPLE
1.2.1. Proprietary Software
1.2.1.1. Norton Antivirus
1.2.1.2. Kapersky Antivirus
1.2.2. Open Source Software
1.2.2.1. Avira Antivirus
2. SPYWARE REMOVER
2.1. a program placed on a computer without the user's knowledge that secretly collect information about the user
2.2. EXAMPLE
2.2.1. Proprietary Software
2.2.1.1. Kapersky internet Security
2.2.2. Open Source Software
2.2.2.1. Spyware Doctor
2.2.2.2. Spyware Remover Spybot
2.2.2.3. Spyware Blaster Nixory
3. DISK DEFRAGMENTER
3.1. Reorganizes the file and unused space on computer hard disk so that the OS accesses data more quickly and program run faster
3.2. EXAMPLE
3.2.1. Proprietary Software
3.2.1.1. Microsoft Defragmenter
3.2.2. Open Source Software
3.2.2.1. MyDefrag
3.2.2.2. Defraggler
4. BACKUP AND RESTORE
4.1. A backup utility allows user to copy files to another storage meduim in case of damage or loss
4.2. EXAMPLE
4.2.1. Proprietary Software
4.2.1.1. Windows Backup Restore
4.2.2. Open Source Software
4.2.2.1. Bacula
4.2.2.2. Amanda
5. ALLOW A USER TO PERFORM MAINTENANCE-TYPE TASK
6. FILE MANAGER
6.1. To provide routine file managment tasks
6.2. EXAMPLE
6.2.1. Proprietary Software
6.2.1.1. Windows Explorer
6.2.1.2. Windows File Manager
6.2.2. Open Source Software
6.2.2.1. AS File Mnager
7. DISK CLEANUP
7.1. A disk cleanup utility searches for and removes unnecessary files
7.2. EXAMPLE
7.2.1. Proprietary Software
7.2.1.1. Microsoft Disk Cleanup
7.2.2. Open Source Software
7.2.2.1. CCleaner
8. COMPRESSION TOOLS
8.1. To shrinks the size of a file
8.2. EXAMPLE
8.2.1. Proprietary Software
8.2.1.1. WinZip
8.2.1.2. WinRAR
8.2.2. Open Source Software
8.2.2.1. 7ZIP
8.2.2.2. PKZIP