The cause of the “0x800F0242” error is that Windows cannot validate the certificate used to sign the printer driver package. This prevents the driver from being installed successfully.
The printer driver is digitally signed with a certificate issued by a trusted Certificate Authority. However, if your system cannot verify this certificate—typically because it does not have the latest trusted root certificates installed—Windows will block the installation.
Normally, when a computer has internet access, Windows automatically updates its list of trusted root certificates from Microsoft’s servers. If your systems have limited or no internet access, Windows may not be able to update these certificates, and as a result, the required root certificate might be missing.
To resolve the issue, please:
1. Update your Windows system to ensure the list of trusted root certificates is current.
2. Retry the installation of the printer driver package after updating.
If possible, please also try installing the driver on another computer to verify whether the issue can be reproduced.