File system scan

I'm running the check file system on the C drive. It's been scanning files for 5 days. How do I exit the scan?

Kimberly,
We are sorry to hear about the inconvenience caused.  We realize that you have the older version of AVG, we have fixed this issue on the latest update. We request you to uninstall http://avgclick.me/UninstallAVGAV that AVG program and reinstall your AVG 2017 version from our official website: http://www.avg.com/us-en/download. Please, feel free to let us know if you require any further assistance. Thank you.