If someone/something is running ccmsetup.exe /uninstall, that will be logged in the logs under %windir%\ccmsetup\logs.
But... if something/someone is running something like "find ProductName like '%client%' in installed applications, and run the msiexec /x {Discovered GUID}", that wouldn't be logged there; that's something directly uninstalling the MSI, and not using the ccmsetup /uninstall routine.
Basically I'm saying this might be difficult to track down what is doing that, at user login.
Since it is "at user login", I'd potentially look at GPOs assigned to Users (not devices necessarily); but maybe someone made a GPO with a WMI Filter for just the Lifebook5511 / 7411.
That would be very interesting, but apparently you have an interesting issue.