Article ID: Q200004
The information in this article applies to:
When trying to enter the license key the following error message appears: "Error in crypto API found. You will not be able to license this software until the problem is solved. Please contact the manufacturer."
Direct I/O relies on the crypto API built into Windows NT. This API consists of a number of system DLLs which changed with almost every Windows NT service pack. There may be the case where during installation of new software some of them have been overwritten by older versions. Microsoft recommends to reapply the latest Windows NT service pack after every installation.
To resolve this issue, reapply your current Windows NT service pack.