diff --git a/scripts/vm-guest-tools.bat b/scripts/vm-guest-tools.bat
index 6d6e467c..7c0e391c 100644
--- a/scripts/vm-guest-tools.bat
+++ b/scripts/vm-guest-tools.bat
@@ -28,10 +28,6 @@ goto :done
 
 :virtualbox
 
-:: There needs to be Oracle CA (Certificate Authority) certificates installed in order
-:: to prevent user intervention popups which will undermine a silent installation.
-cmd /c certutil -addstore -f "TrustedPublisher" A:\oracle-cert.cer
-
 move /Y C:\Users\vagrant\VBoxGuestAdditions.iso C:\Windows\Temp
 cmd /c ""C:\Program Files\7-Zip\7z.exe" x C:\Windows\Temp\VBoxGuestAdditions.iso -oC:\Windows\Temp\virtualbox"
 cmd /c for %%i in (C:\Windows\Temp\virtualbox\cert\vbox*.cer) do C:\Windows\Temp\virtualbox\cert\VBoxCertUtil add-trusted-publisher %%i --root %%i
diff --git a/windows_10.json b/windows_10.json
index 227f0c66..1eadecac 100644
--- a/windows_10.json
+++ b/windows_10.json
@@ -49,8 +49,7 @@
         "./scripts/fixnetwork.ps1",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -85,8 +84,7 @@
         "./scripts/fixnetwork.ps1",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [
diff --git a/windows_2008_r2.json b/windows_2008_r2.json
index 054e03fb..1cf3f0ef 100644
--- a/windows_2008_r2.json
+++ b/windows_2008_r2.json
@@ -47,8 +47,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -82,8 +81,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [
diff --git a/windows_2008_r2_core.json b/windows_2008_r2_core.json
index 124562fd..23d4b8d4 100644
--- a/windows_2008_r2_core.json
+++ b/windows_2008_r2_core.json
@@ -47,8 +47,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -82,8 +81,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [
diff --git a/windows_2012.json b/windows_2012.json
index c243d69b..6b9215c2 100644
--- a/windows_2012.json
+++ b/windows_2012.json
@@ -47,8 +47,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -82,8 +81,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [
diff --git a/windows_2012_r2.json b/windows_2012_r2.json
index a2faab87..e0f87ec7 100644
--- a/windows_2012_r2.json
+++ b/windows_2012_r2.json
@@ -47,8 +47,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -82,8 +81,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [
diff --git a/windows_2012_r2_core.json b/windows_2012_r2_core.json
index e277402f..b63227a1 100644
--- a/windows_2012_r2_core.json
+++ b/windows_2012_r2_core.json
@@ -47,8 +47,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -82,8 +81,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [
diff --git a/windows_2012_r2_hyperv.json b/windows_2012_r2_hyperv.json
index 2ac39f5d..fddda4c2 100644
--- a/windows_2012_r2_hyperv.json
+++ b/windows_2012_r2_hyperv.json
@@ -47,8 +47,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -82,8 +81,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [
diff --git a/windows_2016.json b/windows_2016.json
index 672c28c9..5eaba96f 100644
--- a/windows_2016.json
+++ b/windows_2016.json
@@ -47,8 +47,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -82,8 +81,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [
diff --git a/windows_7.json b/windows_7.json
index 505d3db9..e1b99c7f 100644
--- a/windows_7.json
+++ b/windows_7.json
@@ -51,8 +51,7 @@
         "./scripts/hotfix-KB3102810.bat",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -87,8 +86,7 @@
         "./scripts/dis-updates.ps1",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [
diff --git a/windows_81.json b/windows_81.json
index ce69325b..a4b72444 100644
--- a/windows_81.json
+++ b/windows_81.json
@@ -47,8 +47,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "vboxmanage": [
         [
@@ -82,8 +81,7 @@
         "{{user `autounattend`}}",
         "./scripts/microsoft-updates.bat",
         "./scripts/win-updates.ps1",
-        "./scripts/openssh.ps1",
-        "./scripts/oracle-cert.cer"
+        "./scripts/openssh.ps1"
       ],
       "prlctl": [
         [