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What To Do After Receiving A Backup Alert

Applies to:
  • CrashPlan for Home
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This article is intended for CrashPlan for Home users. For Code42 CrashPlan and CrashPlan for Small Business documentation, read this page on our enterprise support site.


Managing your backup means staying informed about its successes and failures. CrashPlan sends email warnings and alerts to help you stay informed about the status of your backups. If you receive a backup alert and you're not sure why, this article can walk you through the most common reasons.

Alerts and warnings

Alerts and warnings are email messages letting you know if there is a problem with your backup.

Backup Warning
You receive a warning when your computer hasn't backed up (to any destination) for a specified number of days.
Backup Alert
You receive an alert when your computer hasn't backed up (to any destination) for a specified number of days. Alerts are sent as a follow-up to a warning when the computer still hasn't backed up.


  • Alerts and warning are set to three days and five days, respectively, by default
  • You can change the time period for warnings and alerts from Settings > General
  • Alert period(s) are not "reset" until a backup occurs

What to do if you get a backup alert

Check your connection

If you get an email alert telling you that one of your computers hasn't backed up in several days, first make sure that the computer is connected to the Internet and has not been turned off or asleep. If necessary, troubleshoot network issues that could prevent CrashPlan from backing up.

Check for notifications

Next, open the CrashPlan app and look for any errors or other messages that may suggest why the computer isn't backing up. The following resources may be useful for troubleshooting:

Check the CrashPlan app for conflicting settings

Backup window

Is CrashPlan configured to run all of the time, or only during a specific window of time? We recommend setting CrashPlan to run Always.

If CrashPlan is set to run between specific times, make sure both the source and destination computers are on and awake during an overlapping window of time. CrashPlan can't back up or restore outside of this window, and it can't back up if the a computer is off or asleep.

  1. Open the CrashPlan app
  2. Click Settings > Backup > Backup will run: Always
  3. Click Save

CPU resources

Has the CPU throttling been set to 0%? If it's set to 0, CPU resources are not being allocated to CrashPlan and therefore CrashPlan can't back up.

  1. Open the CrashPlan app
  2. Click Settings > General > When user is (Away/Present), use up to: < 0%
  3. Click Save

Restart CrashPlan and your computer

Restarting CrashPlan or your computer can resolve issues. First, restart the CrashPlan service. If you've restarted CrashPlan, and you're still unable to connect to any of your destinations, restarting your computer may resolve the connectivity issue.

Ask a Customer Champion

If you've tried these options and you are still unable to determine why an alert was sent, contact a Customer Champion​ for further assistance.