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CRCs are so called because the check data verification value is a redundancy it adds no information to the message and the algorithm is based on cyclic codes. CRCs are popular because they are simple to implement in binary hardware, easy to analyze mathematically, and particularly good at detecting common errors caused by noise in transmission channels.

Because the check value has a fixed length, the function that generates it is occasionally used as a hash function. The CRC was invented by W. Wesley Peterson in ; the bit polynomial used in the CRC function of Ethernet and many other standards is the work of several researchers and was published during SB-Duplicate File Finder is a basic program that allows users to find and delete duplicate files taking up valuable space on their hard drives.

Clipboard Printer is an extension to the Wndows Clipboard, that will allow a user to easily print the contents of the Windows Clipboard. SB-BMR will also estimate how many calories used in a day to maintain your body weight. SB-File Splitter - Freeware. SB-File Splitter is a free file splitter and merger application. SB-File Splitter can split a file into any specified number of unit sizes. The splitted files can then be easily attached to an email, or stored in a removable device such as USB drive, floppy disk, MP3, or MP4.

SB-File Splitter can also be used to merge the splitted files or use a batch file that can be sent to another user for them to merge the splitted files. There are tools included to compare files and to get the MD5 checksum of a file. PC performance slows down because the programs you run leave behind unwanted files on your hard-drive. After you use the internet, it also leaves files cookies on your hard-drive.

It takes longer for your system to boot and to shutdown. SBCleaner will bring back hard-drive space by shredding up to 35 times unwanted files. It will clean-up your history of activities including internet history. SBCleaner will have your system running like new. SBCleaner protects your privacy. As you work on your PC and browse the Internet, you leave behind traces. SBCleaner Standard Edition. This version offers the most functions. It is very important to keep your system safe as infections have the ability to spread themselves amongst your family, friends and co-workers by gaining unauthorized access to all of your email contacts and computers in the network.

More serious infections can even allow hackers to access your computer to initiate attacks on other machines, distribute mass mailings of unsolicited messages or even steal your personal information. PC Tools AntiVirus Free Edition is a great solution for users looking to protect themselves and save money while doing it.

This feature-rich, easy to use program does a great job at keeping you safe from the most crippling threats such as fast-spreading viruses, deceptive Trojan programs and self-replicating worms.

PC Tools AntiVirus Free Edition offers industry leading security, fast updates from their online database, real-time protection and sophisticated file scanning to make sure your computer remains healthy and free of infections.

Security solutions from PC Tools are trusted and used by millions of people who understand the severity of protecting their business and home-based computers against internet threats. This comprehensive software is very user-friendly and well suited for beginners. The interface features very few buttons to limit the level of frustration while highlighting the most important functions.

Checking the status of your computer, scanning the system for viruses and switching the real-time protection feature on or off is all as simple as clicking one button. Speed of the scan is average for this type of product and can be set to a convenient schedule with ease.

While this is a free version of PC Tools' feature software, the overall differences are rather minimal.