Yesterday when I went to shut down my computer, I got an error box that said:Code:The program could not be started because SECBASE.DLL is missing from your computer.The same error now appears on boot, and shows itself whenever logonui.exe, explorer.exe, or similar programs try to execute. I can get to the point where I can log in to my account, and when I do, explorer will not start. I can't get task manager to start either. Safe mode also wont work without this file. I've only found a couple other places where people have this problem, but there was no fix, and it appears that SECBASE.DLL is not in anyone's W7 installation. I'll try a system recovery, but I don't think it's going to work. I'll report back here either way, but if anyone has ideas, let me know. Note: It IS SECBASE.DLL, not sccbase.dll.