Just to give you some background on Firewire drivers and the driver issue.
Microsoft is the only developer of the Firewire drivers.
Microsoft used to include Firewire drivers native in the OS (XP,7).
Beginning with Windows 8/10/11, Microsoft decided to remove them claiming it is a legacy product, but many users still needed them.
They then put the drivers as a separate download on their website but later totally removed them.
Some computer manufacturers with prebuilt systems + OS do include the legacy Firewire drivers in the system, but some do not.
If your system manufacturer did include them, you just need to install the Firewire card and it will automatically see the card and driver.
If the system manufacturer did not include them for you or if this was your DYI build of the Windows 11 system, it will not have the drivers.
You can get the Microsoft legacy drivers that will work with Windows 11 from our website here but there is a known issue:
https://www.vantecusa.com/CKEdit/images/files/1394_OHCI_LegacyDriver_20200106.zip
Download, unzip to a folder, and run the MSI exe file.
If you are using the earlier version of Windows 11, it will be fine, but later or updated Windows 11 OS may encounter issues with security.
You will get the message that the driver cannot load on this device:
When you click on the “Learn more" button to read about the issue, it references the problem with the Memory Integrity feature.
According to the message, it is best to ask the manufacturer, if there is an updated version of the driver that will be compatible with the Memory Integrity feature. If there is not an updated driver, the only option is to turn off the memory integrity feature. We do not have any updated Firewire driver because the only Firewire driver was developed by Microsoft and only Microsoft can update them.
There is no workaround at this time. This applies to any manufacturer's Firewire card using any Firewire chipset until Microsoft comes out with a fix or workaround. The original drivers are all from Microsoft. No one else does have an alternate Firewire driver. We are also looking forward to Microsoft for an updated driver.
