diff --git a/IWbemClassObject/main.cpp b/IWbemClassObject/main.cpp
index a54d379..168d1b6 100644
--- a/IWbemClassObject/main.cpp
+++ b/IWbemClassObject/main.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <vector>
 #include <Windows.h>
 #include <Wbemidl.h>
 #pragma comment(lib, "wbemuuid.lib")
@@ -8,6 +9,40 @@ using namespace std;
 
 int main(int argc, char** argv) {
 
+// Najde ldisky
+    const char* drive_names[] = {"A:\\", "B:\\", "C:\\", "D:\\", "E:\\", "F:\\", "G:\\", "H:\\", "I:\\", "J:\\", "K:\\", "L:\\", "M:\\", "N:\\", "O:\\", "P:\\", "Q:\\", "R:\\", "S:\\", "T:\\", "U:\\", "V:\\", "W:\\", "X:\\", "Y:\\", "Z:\\"};
+
+    std::vector< const char* > ldisks;
+ 
+    DWORD drives = GetLogicalDrives();
+    cout << "Connected logical drives: ";
+    for (int i = 0; i < 26; i++)
+    {
+        if (drives & (1 << i))
+        {
+            ldisks.push_back(drive_names[i]);
+            cout << drive_names[i] << " ";
+        }
+    }
+    cout << endl;
+
+// Serial ID ldisku
+    DWORD disk_serialINT;
+
+    auto ldisks_count = size(ldisks);
+    ldisks_count = ldisks_count-1
+
+
+    if (!GetVolumeInformationA("C:\\", NULL, NULL, &disk_serialINT, NULL,
+        NULL, NULL, NULL))
+    {
+        std::cout << "Failed: " << GetLastError() << std::endl;
+        return 1;
+    }
+
+    std::cout << "Current directory volume serial numnber: " << std::hex << disk_serialINT << std::endl;
+
+// IWbem HWIDs
 	cout << GetVideoCardDriverVersion() << endl;
 
 return 0;
diff --git a/IWbemClassObject/query.cpp b/IWbemClassObject/query.cpp
index c41acf6..5f6eeb7 100644
--- a/IWbemClassObject/query.cpp
+++ b/IWbemClassObject/query.cpp
@@ -41,7 +41,7 @@ std::string GetVideoCardDriverVersion() {
 	}
 
 	if (!FAILED(hr) && uReturned) {
-		hr = pObj->Get(L"DriverVersion", 0, &var, NULL, NULL);
+		hr = pObj->Get(L"PNPDeviceID", 0, &var, NULL, NULL);
 		if (SUCCEEDED(hr)) {
 			char str[MAX_PATH];
 			WideCharToMultiByte(CP_ACP, 0, var.bstrVal, -1, str, sizeof(str), NULL, NULL);