The HashCheck Shell Extension makes it easy for you to calculate and verify file hashes/checksums from Windows Explorer.
First, HashCheck can process and verify the hashes/checksums stored
in checksum files–these are files with a .sfv, .md4, .md5, or .sha1
file extension. Just double-click on the checksum file, and HashCheck
will check the actual checksums of the listed files against those
specified in the checksum file.
Second, HashCheck will add a “File Hashes” tab to the Explorer file
properties dialog so that you could easily check the hash of a file (or
even multiple files and directories) from Explorer. You can also save
the results to a checksum file.