VT Hash Check adds a Windows Explorer context menu item to compute the MD5 hash checksum of any file and to then send that checksum to www.virustotal.com for checking against their Virus database.

If the checksum matches a file already scanned by VirusTotal.com then the results of 41 anti-virus scanners are shown.
VirusTotal, and this software by extension, is not substitute any antivirus program installed in a PC, as it only scans individual files on demand. It does not offer permanent protection for the users system either.
Although the detection rate afforded by the use of multiple antivirus engines is far superior to that offered by just one product, these results DO NOT guarantee the harmlessness of a file.

Execute the included setup.exe file to install.

By default, only the MD5 hash is computed. The MD5 hash algorithm is vulnerable to theoretical collisions and has been recommended to be avoided for cryptographic functions requiring a high level of security1. While this theoretical vulnerability may represent a deficiency in the operation of this particular program, I don't feel that it should cast any doubt onto the results returned by the software via Virus Total. Nevertheless, for those of you interested in using a theoretically superior hash function, I have included the option to use the SHA12 hash function instead.

To invoke the SHA1 option, you may pass the software the !SHA1 argument before the file path like this:
VTHash.exe !SHA1 C:\somefile.exe
If you prefer for SHA1 to be the default, create a file called "usesha1" (sans quotes) in the installation directory (by default: C:\Program Files\Boredom Software\VT Hash Check):

VT Hash Check does not actually launch or execute any file processed through it. It reads the data from the file, computes the hash based on the data, and then closes it. The data is treated the same way whether the file being hashed is an executable or and image or a text file.

The license of this software is Freeware, you can free download and free use this file compare software.