Fix for https://github.com/ansible/ansible-modules-extras/issues/2090

windows/win_regedit.ps1

@@ -118,8 +118,8 @@ else
 
 }
 
-if($registryDataType -eq "binary" -and $registryData -ne $null) {
-   $registryData = Convert-RegExportHexStringToByteArray($registryData)
+if($registryDataType -eq "binary" -and $registryData -ne $null -and $registryData.GetType().Name -eq 'String') {
+      $registryData = Convert-RegExportHexStringToByteArray($registryData)
 }
 
 if($state -eq "present") {

windows/win_regedit.py

@@ -43,7 +43,7 @@ options:
     aliases: []
   data:
     description:
-      - Registry Value Data.  Binary data should be expressed as comma separated hex values.  An easy way to generate this is to run C(regedit.exe) and use the I(Export) option to save the registry values to a file.  In the exported file binary values will look like C(hex:be,ef,be,ef).  The C(hex:) prefix is optional. 
+      - Registry Value Data.  Binary data should be expressed a yaml byte array or as comma separated hex values.  An easy way to generate this is to run C(regedit.exe) and use the I(Export) option to save the registry values to a file.  In the exported file binary values will look like C(hex:be,ef,be,ef).  The C(hex:) prefix is optional. 
     required: false
     default: null
     aliases: []
@@ -96,13 +96,24 @@ EXAMPLES = '''
 
   # Creates Registry Key called MyCompany,
   # a value within MyCompany Key called "hello", and
-  # binary data for the value "hello" as type "binary".
+  # binary data for the value "hello" as type "binary"
+  # data expressed as comma separated list
   win_regedit:
     key: HKCU:\Software\MyCompany
     value: hello
     data: hex:be,ef,be,ef,be,ef,be,ef,be,ef
     datatype: binary
 
+  # Creates Registry Key called MyCompany,
+  # a value within MyCompany Key called "hello", and
+  # binary data for the value "hello" as type "binary"
+  # data expressed as yaml array of bytes
+  win_regedit:
+    key: HKCU:\Software\MyCompany
+    value: hello
+    data: [0xbe,0xef,0xbe,0xef,0xbe,0xef,0xbe,0xef,0xbe,0xef]
+    datatype: binary
+
   # Delete Registry Key MyCompany
   # NOTE: Not specifying a value will delete the root key which means
   # all values will be deleted