(HashTab is a Windows shell extension. After installation, a "File Verification" tab will be added to the file properties window of Windows Explorer. This tab can quickly and easily view the MD5, SHA1, and CRC32 equivalent verification codes of the file. Support method: Windows7/Vista/2008/2003/XP/2000/9x You can right-click the file to view MD5, SHA1, CRC32, etc. Believe it!)