'Error Writing To Disk' Windows Message

Occasionally, users may encounter a Windows "Error Writing to Disk" when installing ESET software. This error is usually related to one of the following reasons:

• Insufficient rights to write to Temp folder
• Not logged in as an administrator
• Not enough space on disk
• Missing Temp folder(s)
• Possible damaged archive/installer, although unlikely

Take these steps to resolve the issue:

1. Verify that the following folders exist: C:\Windows\Temp and C:\Documents and Settings\USERNAME\Local Settings\Temp
2. Next, verify that the 'Temp and TMP' folders are listed in the Environmental Variables area by following the steps below:
   
   Windows NT/2000/2003/XP: Click Start, right-click My Computer, and click Properties. Click the Advanced tab and then click Environmental Variables.
   
   Windows Vista: Click Start, right-click Computer, and click Properties. Click Advanced System Settings in the left column. Click the Advanced tab and then click Environmental Variables.
3. Using Windows Explorer, verify that the folders listed in "Environmental Variables" actually exist. If so, delete and recreate them (C:\Windows\Temp and C:\Documents and Settings\USERNAME\Local Settings\Temp), and then attempt to reinstall the ESET product.

You can also try using the settmp tool from our website, which will automatically set both the user and system TEMP/TMP variables to C:\Windows\Temp (First make sure the C:\Windows\Temp folder exists).

For more information on disk error checking, please see the following Microsoft article.