shameless copied from
https://superuser.com/questions/245775/is-there-a-built-in-checksum-utility-on-windows-7
CertUtil is a pre-installed Windows utility that can be used to generate hash checksums:
certUtil -hashfile pathToFileToCheck [HashAlgorithm]
HashAlgorithm choices: MD2 MD4 MD5 SHA1 SHA256 SHA384 SHA512
So for example, the following generates an MD5 checksum for the file
C:\TEMP\MyDataFile.img: CertUtil -hashfile C:\TEMP\MyDataFile.img MD5