I want to switch my welcome screen options to the fast user switching screens, but everytime I try to change this setting a box appears saying "A recently installed program has disabled the Welcome Screen and Fast User Switching. To restore these features, you must uninstall the program. The following file name might help you identify the program that made the change: RtlGina2.dll"

I found this file, but it's an application extension that came with the computer, and I'd have to delete the whole program. Should I uninstall just this file? Is it safe? If not, what should I do?