My L412 came with Windows 7 Home Premium. I've reinstalled Windows using a purchased Windows 7 ultimate DVD and I've installed most of the software but I still have 3 base system devices with yellow exclamation marks on them.
Any ideas on how to fix?
The Lenovo Windows preload contains all required drivers. When a clean, shrink wrap version of Windows is installed, many of the drivers, and the optimizations of the preload are lost.
In this particular case, the missing drivers are most likely for the card reader. Try downloading and installing the following file from the Lenovo support site.