Index: /trunk/src/VBox/ValidationKit/tests/additions/tdAddBasic1.py
===================================================================
--- /trunk/src/VBox/ValidationKit/tests/additions/tdAddBasic1.py	(revision 84164)
+++ /trunk/src/VBox/ValidationKit/tests/additions/tdAddBasic1.py	(revision 84165)
@@ -331,4 +331,7 @@
         """
 
+        sUser     = oTestVm.getTestUser();
+        ## @todo Do we need to get/use the test user's password as well here somehow?
+
         #
         # Install the public signing key.
@@ -337,5 +340,5 @@
             fRc = self.txsRunTest(oTxsSession, 'VBoxCertUtil.exe', 1 * 60 * 1000, '${CDROM}/cert/VBoxCertUtil.exe',
                                   ('${CDROM}/cert/VBoxCertUtil.exe', 'add-trusted-publisher', '${CDROM}/cert/vbox-sha1.cer'),
-                                  fCheckSessionStatus = True);
+                                  sAsUser = sUser, fCheckSessionStatus = True);
             if not fRc:
                 reporter.error('Error installing SHA1 certificate');
@@ -343,5 +346,6 @@
                 fRc = self.txsRunTest(oTxsSession, 'VBoxCertUtil.exe', 1 * 60 * 1000, '${CDROM}/cert/VBoxCertUtil.exe',
                                       ('${CDROM}/cert/VBoxCertUtil.exe', 'add-trusted-publisher',
-                                       '${CDROM}/cert/vbox-sha256.cer'), fCheckSessionStatus = True);
+                                       '${CDROM}/cert/vbox-sha256.cer'),
+                                      sAsUser = sUser, fCheckSessionStatus = True);
                 if not fRc:
                     reporter.error('Error installing SHA256 certificate');
@@ -368,5 +372,5 @@
                                                    '"HKLM\\Software\\Microsoft\\Windows\\CurrentVersion\\Setup"',
                                                    '/v', 'LogLevel', '/t', 'REG_DWORD', '/d', '0xFF'),
-                                                   fCheckSessionStatus = True);
+                                                   sAsUser = sUser, fCheckSessionStatus = True);
 
         for sFile in asLogFiles:
@@ -379,5 +383,6 @@
         #
         fRc = self.txsRunTest(oTxsSession, 'VBoxWindowsAdditions.exe', 5 * 60 * 1000, '${CDROM}/VBoxWindowsAdditions.exe',
-                              ('${CDROM}/VBoxWindowsAdditions.exe', '/S', '/l', '/with_autologon'), fCheckSessionStatus = True);
+                              ('${CDROM}/VBoxWindowsAdditions.exe', '/S', '/l', '/with_autologon'),
+                              sAsUser = sUser, fCheckSessionStatus = True);
 
         #