Open UPDATE File
UPDATE is a file extension associated with ISAPI Update Format files.
ISAPI, which stands for Internet Server Application Program Interface, is a set of instructions associated with the Windows OS that enables you to write a web server application.
Such instructions are more efficient and therefore will run faster than a Common Gateway Interface Application, CGI.
The UPDATE file contains the internals of an updated DLL for the web server, which is automatically recognized and updated by the ISAPI Loader.
How an UPDATE file works
When the ISAPI loader discovers a new UPDATE file, it terminates the current requests from the web server, bundles the new requests, changes the existing RUN file to use the BACKUP extension, renames the UPDATE file to RUN, reloads the new RUN file, and, then it resumes normal web server operations.
This cycle is continuous, during the operation of the WEB service.
Software to open an UPDATE file
UPDATE files are not designed to be opened manually, however the recognized software to handle such files is: