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

Question

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

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

What is this program and is it a problem?

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"
xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities">
  <Identity Name="DriverToaster" ProcessorArchitecture="x86" Publisher='CN="PC-Doctor, Inc.", O="PC-Doctor, Inc.", L=Reno, S=Nevada, C=US' Version="1.3.0.0" />
  <Properties>
    <DisplayName>SupportAssist Driver Update</DisplayName>
    <PublisherDisplayName>Dell Inc.</PublisherDisplayName>
    <Logo>Assets\SupportAssist.150x150.png</Logo>
  </Properties>
  <Resources>
    <Resource Language="en-us" />
  </Resources>
  <Dependencies>
    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.14257.0" MaxVersionTested="10.0.15063.0" />
  </Dependencies>
  <Capabilities>
    <rescap:Capability Name="runFullTrust" />
  </Capabilities>
  <Applications>
    <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"/>
    </Application>
  </Applications>
</Package>

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

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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\