SQLCheck improvement

Checks for VMWARE vnetflt.sys driver; may cause occasional network latency.

Author: Malcolm-Stewart

SQLCheck/.vs/SQLCheck/v15/Server/sqlite3/storage.ide

@@ -391,7 +391,17 @@ public static void CollectComputer(DataSet ds)
             {
                 if (SystemEventLog != null) SystemEventLog.Close();
             }
-            
+
+            //
+            // Check for existance of VMWARE's vnetflt.sys driver
+            // May cause network delays or other instability. See: https://kb.vmware.com/s/article/2148218 for symptoms and how to disable.
+            //
+            // HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\vnetflt\
+            //
+
+            string vNetFltExists = Utility.CheckRegistryKeyExists(@"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\vnetflt");
+            Computer["VNetFltExists"] = vNetFltExists == "1" ? true : false;
+
         }
 
         public static void CollectDomain(DataSet ds)

SQLCheck/SQLCheck/Collectors.cs

@@ -32,5 +32,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.1283.0")]
-[assembly: AssemblyFileVersion("1.0.1283.0")]
+[assembly: AssemblyVersion("1.0.1285.0")]
+[assembly: AssemblyFileVersion("1.0.1285.0")]

SQLCheck/SQLCheck/Properties/AssemblyInfo.cs

@@ -153,6 +153,7 @@ public static DataSet CreateDataSet(String ComputerName)
             dt.AddColumn("RebootNeeded", "Boolean");
             dt.AddColumn("LastSystemReboot", "DateTime");    // added to display last system reboot  clintonw 9/8/2022
             dt.AddColumn("CredentialGuard", "Boolean");
+            dt.AddColumn("VNetFltExists", "Boolean");  // VMWare driver that may cause packet delays
             ds.Tables.Add(dt);
 
             //

SQLCheck/SQLCheck/Storage.cs

@@ -290,6 +290,7 @@ static void ReportNetwork(DataSet ds, TextWriter s)  // outputs network settings
 
             // global network settings
 
+            DataTable dtComputer = ds.Tables["Computer"];
             DataTable dtNetwork = ds.Tables["Network"];
             DataTable dtNetworkAdapter = ds.Tables["NetworkAdapter"];
             DataTable dtHostAlias = ds.Tables["HostAlias"];
@@ -379,6 +380,20 @@ static void ReportNetwork(DataSet ds, TextWriter s)  // outputs network settings
             s.WriteLine($"FLTMC Filters: {filterNames}");
             s.WriteLine();
 
+            // vmnetflt.sys
+
+            DataRow drComputer = dtComputer.Rows[0];
+            if (drComputer.GetBoolean("VNetFltExists"))
+            {
+                s.WriteLine("Warning: The vnetflt.sys driver is installed on this machine. This could cause delayed packets or other issues.");
+                s.WriteLine("See https://kb.vmware.com/s/article/2148218 for symptoms and how to disable.");
+            }
+            else
+            {
+                s.WriteLine("Info: The vmnetflt.sys driver is not installed on this machine.");
+            }
+            s.WriteLine();
+
             // network mini drivers
 
             DataTable dtNetworkMiniDriver = ds.Tables["NetworkMiniDriver"];