A system error usually means something went wrong with your computer’s software or hardware — like a missing file, bad update, or even a faulty driver.
To fix it:
Restart your computer (yep, the classic fix).
Run a virus scan just in case.
Make sure your system is updated.
If you know when it started, you can try a system restore to go back to when things worked fine.
If it keeps happening, note down the error message — that’ll help figure out exactly what’s causing it.