ESET Customer Advisory 2016-0014
October 3, 2016
ESET recently discovered an issue with old drivers remaining in use after a product update on Windows 10. ESET prepared fixed product builds and also an automatically distributed workaround in the form of an updated Antivirus and antispyware scanner module.
When a user running Windows 10 updated their ESET product to an affected version, drivers belonging to the product did not update and the old drivers remained in use. The product did not register this anomaly and no error message or protection status change was shown. Depending on the difference between the old version and the new version, the actual consequences varied. For example, if the user updated from ESET Endpoint product 6.3 to ESET Endpoint product 6.4, the differences were minor or none and almost everything worked properly. If they updated from the 5th generation of ESET Endpoint products to the 6th generation of ESET Endpoint products (or even from the 4th generation of ESET Business Edition products to the 6th generation of ESET Endpoint products), more differences were present and some features (such as Device control) may have not worked, while others (such as Real-time file system protection) would work (and the user was still protected) with the default settings (i.e. no user-made configuration changes would be applied, as there was a change in the way configuration is stored between 5th and 6th generation of ESET Endpoint products). ESET prepared fixed builds of ESET Endpoint products 6.4 and ESET Endpoint products 5.0 and will release them soon. Also, the Antivirus and antispyware scanner module version 1502 automatically detects older driver versions and replaces them with the correct ones, therefore fixing the situation.
There are three possible solutions available and the user may choose the one they prefer the most.
A product was affected if it was running on Windows 10 and it was updated from any previous version to one of the following versions:
Version 1.0 (October 3, 2016): Initial version of this document