Just today I received a slightly unsettling and almost malware-esque warning:

enter image description here

Apparently DriverToaster.exe is reporting that The parameter is incorrect.

What is this program and is it a problem?

  • Same situation here.. I think their servers are down
    – jjanton
    Jul 25, 2017 at 19:38
  • 1
    For those that are interested I have managed to raise a support ticket with Dell to try and get an explanation, but I don't hold out much hope.
    – Mokubai
    Jul 25, 2017 at 21:32
  • I got this message on 12 August 2017 at around 1830 EST. I am wondering if there's been any update you could share from your end @Mokubai?
    – J. Ari
    Aug 12, 2017 at 22:34
  • 2
    @J.Ari Only that Dell has (rather vaguely) confirmed that it is most likely one of their applications as I described below. The best I got from them was an update to the SupportAssist application. There has been no explanation for the cause of the error itself.
    – Mokubai
    Aug 13, 2017 at 7:07

1 Answer 1


It would appear that this is one of the parts of the Dell SupportAssist tool. The AppxManifest.xml in the directory:

DisplayName="Dell SupportAssist" Description="SupportAssist Driver Update"

It appears that this is a legitimate program preinstalled by Dell, and not a drive-by malware download. It could be simply a bug or inability to contact a Dell server.

The full AppxManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
  <Identity Name="DriverToaster" ProcessorArchitecture="x86" Publisher='CN="PC-Doctor, Inc.", O="PC-Doctor, Inc.", L=Reno, S=Nevada, C=US' Version="" />
    <DisplayName>SupportAssist Driver Update</DisplayName>
    <PublisherDisplayName>Dell Inc.</PublisherDisplayName>
    <Resource Language="en-us" />
    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.14257.0" MaxVersionTested="10.0.15063.0" />
    <rescap:Capability Name="runFullTrust" />
    <Application Id="DriverToaster" Executable="DriverToaster.exe" EntryPoint="Windows.FullTrustApplication">
      <uap:VisualElements DisplayName="Dell SupportAssist" Description="SupportAssist Driver Update" BackgroundColor="#777777"
      Square150x150Logo="Assets\SupportAssist.150x150.png" Square44x44Logo="Assets\SupportAssist.44x44.png"/>

I'll update this with more info if I find it. For now it is enough to know it is not malware.

Checking in the Apps & Features control panel I had two "Dell SupportAssist" programs. One was ~580KB, the other 48.1MB. It looked like the 580KB one was a UWP app as I was given the option to "Move" it. Uninstalling this one appears to have removed the folder C:\Program Files\WindowsApps\DriverToaster_1.3.0.0_x86_rqs2nt378nwsp\

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