HashMyFiles是nirsoft出品的一款用于效验文件md5、sha1、CRC32、sha256值的小软件！可以集成到右键菜单中，可以一次效验一个文件夹下所有文件的md5/sha1值！新版还增加了VirusTotal安全检测功能。

MD5效验工具HashMyFiles更新日志：

Version 2.11:
Added 'Run As Administrator' option (Ctrl+F11).
Version 2.10:
Added accelerator key to 'Open In VirusTotal Web Site' option. (Ctrl+R)
Fixed the 'Open In VirusTotal Web Site' option to work properly with MD5 hash when there is no SHA256 hash.
Fixed bug: HashMyFiles failed to remember the last size/position of the main window if it was not located in the primary monitor.
Version 2.05:
Added option to add 'Open In VirusTotal Web Site' to the context menu of Windows explorer. When right-clicking on a file in Windows Explorer and choosing 'Open In VirusTotal Web Site', HashMyFiles calculates the hash of this file and then opens it in VirusTotal Web site.
Added /virustotal command-line option, which calculates the hash of the specified file and then opens it in VirusTotal Web site.
Version 2.03:
Fixed HashMyFiles to handle daylight saving time properly, like Explorer on Windows 7.