@deelilaa DISM should start right away, or close enough, and let you know when it goes to completion or if it errors out. If you've restarted your computer a couple times—a real restart, not just closing the laptop lid and opening it again—sfc should be able to at least start. But try rebooting a couple more times, just to see whether it makes a difference.
If you get the same error, I'd like to see a screenshot, just in case there's an error code or anything else that might be relevant. So please take one and attach it to a post.
Please also let me know your Windows version. There are several ways to find it, but the simplest is to click on the Windows icon in the lower left corner, select Settings, then System, then About (at the bottom of the list). Please take a screenshot of the information under "Windows specifications; I don't need to see the other info on that page.
To take a screenshot, hit Windows key-shift-S and drag your cursor over the section of screen you want to capture. Then open Paint or another image-editing app and crtl-V to paste.
Finally, open Settings > Update & Security, and see whether there are any update errors listed.