How to fix a start-up / boot-time command line error message

Question

When I'm signing onto my Windows 10 computer and it's booting up a pop-up box comes up. It states: "Error" and says "Invalid command line". Only two options to close pop-up box is to either "x" out of it or by clicking on the "OK" within the box. I've been searching all day as to what this error is, how to Fix Command Line Startup Error message or How to fix errors seen during startup. And I've had no luck. Mr Fix-It was no help as well. I did backup the computer and then ran at Admin command prompt to scan the registry. And it founds no errors. I don't know how else to fix this correctly. Thank you anyone that can assist me. 

Answer 1

You could download, install & run AutoRuns to find the culprit.

Answer 2

I ran the Admin command prompt again to re-scan the registry. This time it found errors and then repaired the C drive. I re-booted and the boot up error message did not appear.  Issue is resolved. Thank you.

Answer 3

I ran the Admin command prompt again to re-scan the registry.

Thanks for the report. What command did you use to scan the registry?

Answer 4

I apologize for not stating that command I used. I used the command "sfc /scannow".