简介：Md5Checker 是一款免费、快速、小巧、易用的文件 MD5 值计算、验证、管理软件

同时计算和显示多个文件的 MD5 值；
利用 MD5 值快速验证文件是否被改动；
方便地读取、保存、添加、删除、更新 MD5 值。
A software application to manage, compute, and verify your files' MD5s.
Did your computer ever infected by some new Viruses, Trojans or other threats even you had installed an Anti-Virus program? Did you have no idea which installation files are "good" and which are "bad" when you rebuild your system after a big Viruses explosion? Did you know even the files are disinfected, they are still permanently modified? (For example, the virus codes are removed, but blanks are left. They probably can't be executed properly after disinfected.)

Why should I use Md5Checker?
· To verify the integrity of downloaded files: With Md5Checker, user can calculate MD5 checksum of downloaded files and compare them with provided when downloading via HTTP, FTP, P2P, etc.
· To detect unknown viruses: Only-for-existing-viruses DB based anti-virus programs can rarely detect all emerged new (i.e. not in the DB) viruses in time. As a supplement, Md5Checker checks whether files are original. By that user can detect any change of file including virus infection.
· To make sure that the installation files are secure: System will be re-infected by viruses time and again while reinstalling software if the installation file had been infected. To avoid this, Md5Checker user can calculate and save the MD5 checksum right after downloaded/copied installation files , i.e. make sure these files are original (This step can be skipped if there are MD5 checksum downloaded/copied along with these files), and verify these files again upon using them.
· To make sure that files in a removable storage device are secure: In order to avoid bringing in viruses from using the removable storage device, Md5Checker user can calculate, save MD5 checksum in advance and verify files afterwards in the device. It is also a good idea to copy Md5Checker into the device to be able to check files anywhere and anytime. Note: Don’t forget to check the copied Md5Checker.
· To check out the security status of the system: It will indicate that the system was infected if the MD5 checksum of one executable file was changed without any action.
· To find out the virus source: It will indicate that one executable file is the virus source if the MD5 checksum of other several executable files have changed unexpectedly after executed this file.
· To calculate MD5 checksum for publishing: File distributors and software authors can use Md5Checker to calculate MD5 checksum of their files and publish them on the website.
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