This program will help you to easily free up disk space from temporary, unwanted files, and clean system registry from unneeded registry keys. It is absolutely free and does not contain adware or spyware functions.

LCleaner is very easy to use just select the items you would like to clean and then press the Clean Selected button.

LCleaner can clear system temporary files, user temporary files, Windows log files, Windows memory dump files, recycle bin, recent documents list, run list MRU, common dialogs MRU, typed URLs and more.

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Hazard Shield  is a fast antimalware program. Hazard Shield can scan and remove threats many vendors can´t even touch. With just the click of two buttons you can scan for threats and remove them. Hazard Shield has a friendly interface that anyone can easily use, so you won´t waste any time finding out how to use the program. Hazard Shield also comes with some useful intergrated tools. The most popular is the file killer. Hazard Shield´s file killer can remove virtually any file on your system. Its very useful for removing locked or in-use files. Several other tools include an uninstall manager, a process manager and a scheduled task manager.
Want more? Hazard Shield also comes with Realtime protection! Hazard Shield´s Realtime moniter can protect your computer by removing threats before they can do damage. Hazard Shield´s Realtime moniter is free and uses very little system resources.

if you loose Outlook .PST password you can use this software PstPassword 1.02, PstPassword is a small tool that will recover lost password of Outlook .PST (Personal Folders) file.

Using PstPassword
PstPassword
doesn’t require any installation process or additional dll files. In order to start using it, just run the executable file, PstPassword.exe
After you run PstPassword, the main window displays the list of all PST files of the current logged on user (Under Documents and SettingsUser NameLocal SettingsApplication DataMicrosoftOutlook). For each password-protected PST file, PstPassword provide 3 alternative passwords that will open the PST file. If the PST is not protected by a password, the 3 password columns remain empty, and the CRC value column is 0×00000000.

If you want to recover a password of PST file that doesn’t appear in the default list, you can press F7 and select the desired PST file, or simply drag the PST file from Explorer window into the main window of PstPassword.
If from some reason PstPassword fails to read a PST file, an error message is displayed under the error column, and the item is painted with pink color

Hazard Shield is a free software that will help you scan and remove malware, with only click of two buttons you can scan for threats and remove them. The most popular tools from  Hazard Shield  is the file killer. Hazard Shield´s file killer can remove virtually any file on your system. Its very useful for removing locked or in-use files. Several other tools include an uninstall manager, a process manager and a scheduled task manager.

Free system optimazation and privacy tool software, with this freeware ( CCleaner ) will removes unused files from your system and with this way your computer will run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history.

Cleans the following:

* Internet Explorer: Temporary files, URL history, cookies, Autocomplete form history, index.dat.
* Firefox: Temporary files, URL history, cookies, download history.
* Windows: Recycle Bin, Recent Documents, Temporary files and Log files.
* Registry cleaner
* Advanced cleaner to remove unused and old entries, including File Extensions, ActiveX Controls, ClassIDs, ProgIDs, Uninstallers, Shared DLLs, Fonts, Help Files, Application Paths, Icons, Invalid Shortcuts and more… also comes with a comprehensive backup feature.
* Third-party applications: Removes temp files and recent file lists (MRUs) from many apps including Opera, Media Player, eMule, Kazaa, Google Toolbar, Netscape, MS Office, Nero, Adobe Acrobat, WinRAR, WinAce, WinZip and many more…
* 100% Spyware FREE: This software does NOT contain any Spyware, Adware or Viruses.

Another clean tools fo your computer , Free windows sweeper - free privacy clean-up tool . This software will clean Internet and computer traces, browser history, cookies, index.dat files, typed URLs and more.

PassGen is a random password generator which can generate strong passwords for different applications.

Features:

* It can generate passwords of variable length & in variable quantity.
* Generated passwords can be easily copied to the clipboard or saved as a file for later use.
* Repetition of characters in passwords can be prevented.
* Alphabets (Uppercase & Lowercase), numerals & special characters can be used in combination to generate strong passwords.
* User specified characters or symbols can also be used.
* Password strength is analyzed & shown based on its length & composition.
* Settings can be saved.

With BCArchive software you may encrypt and compress a group of files/folders to an encrypted archive (i.e. single file). You may store all you confidential files in such archive accessing it whenever you need it. All your files are encrypted, protected from unauthorized access. You may create self-extracted program containing encrypted archive and e-mail it to your friend. BCArchive uses strong encryption symmetric and asymmetric algorithms.

Turns any USB Flash Drive into a key that prevents unauthorized people from using your computer. USB PC Lock will automatically lock your computer and perform other actions when you step away from it.

Features:

* Lock worksation when you step away.
* Lock MSN.
* Stop streaming media traffic.
* Mute audio.
* Start/Stop event logger.6. Start/Stop batch.

UltraShredder deletes sensitive files by overwriting them with random characters, saving it to disk each time, and then bypasses the recycle bin, thus acting as your personal, portable file shredder. If the file were to be recovered by a data recovery program, they would only be able to see unintelligible characters on disk where the file used to be.

The program is a good tool to destroy sensitive data, and is very small with a minute memory footprint, and makes no changes to your system whatsoever.