I am using the Thin Installer (v1.3.0007) in an SCCM task sequence. In testing I find that it installs updates fine but ThinInstaller.exe never exits. It just stays open and the task sequence times out.
I have run the process 2 ways. First I created an SCCM package with the ThinInstaller folder and a command line. Second I followed Lenovo directions and ran a command line task to copy everything to the client and a second command line task to run a .cmd file.
In both instances drivers installed OK. The Update log ends with "Message: Shut Down the Application" but ThinInstaller.exe stays in memory.