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CrashPlan Support

CrashPlan Installer Does Not Open On Some Windows Installations

Applies to:
  • CrashPlan for Home
Need enterprise or small business documentation?
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.


Depending on your Windows group policy settings for downloading executable files, opening the CrashPlan installer may give no response or not launch. In these circumstances, Windows notes that the executable file was downloaded from the internet and blocks the file to help protect your computer. This article explains how to resolve the issue and launch the installer.


  • CrashPlan app for Windows on devices with restrictive group policies

Recommended solution

To unblock the CrashPlan installer:

  1. Right click on the installer and select Properties.
  2. From the General tab, click Unblock.

CrashPlan Properties - Unblock

  1. Click OK.
  2. Open the CrashPlan installer.

Alternative solution

Nonstandard Process
The information presented here describes a configuration that some users have successfully implemented, but that are outside the scope of normal support. Our Customer Champions cannot assist you with tasks outside normal support, so you assume all risk of unintended behavior. However, you might find additional support from other users in our forum.
Enterprise customers can contact sales about engaging our PRO Services team.

You must have the group policy editor installed on your computer to unblock all future downloads:

  1. Click the Start Menu and type the following in the search box and press enter: gpedit.msc
  2. Go to User Configuration > Administrative Templates > Windows Components > Attachment Manager
  3. Double-click Do not preserve zone information in file attachments
  4. Select Enabled
  5. Click OK
    Files will no longer be marked as Blocked when they originate from another computer. This only applies to future downloads. To unblock previously saved files, follow the Recommended Solution.
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