diff --git a/stm/lib/usbd_desc.c b/stm/lib/usbd_desc.c
index d4ada2de2..1edbdbfac 100644
--- a/stm/lib/usbd_desc.c
+++ b/stm/lib/usbd_desc.c
@@ -52,13 +52,10 @@
 /** @defgroup USBD_DESC_Private_Defines
   * @{
   */ 
+/*
 #define USBD_VID                        0x0483 // TODO set VID
-
 #define USBD_PID                        0x5720 // TODO set PID
 
-/** @defgroup USB_String_Descriptors
-  * @{
-  */ 
 #define USBD_LANGID_STRING              0x409
 #define USBD_MANUFACTURER_STRING        "STMicroelectronics" // TODO set
 #define USBD_PRODUCT_HS_STRING        "VCP/MSC in HS Mode" // TODO set
@@ -69,10 +66,27 @@
 #define USBD_INTERFACE_HS_STRING      "VCP/MSC Interface" // TODO set
 #define USBD_CONFIGURATION_FS_STRING  "VCP/MSC Config" // TODO set
 #define USBD_INTERFACE_FS_STRING      "VCP/MSC Interface" // TODO set
+*/
 /**
   * @}
   */ 
 
+// seems we need to use this VID/PID to get it to work on windows
+
+#define USBD_VID                        0x0483
+#define USBD_PID                        0x5740
+
+#define USBD_LANGID_STRING              0x409
+#define USBD_MANUFACTURER_STRING        "STMicroelectronics"
+#define USBD_PRODUCT_HS_STRING          "STM32 Virtual ComPort in HS mode"
+#define USBD_SERIALNUMBER_HS_STRING     "00000000050B"
+#define USBD_PRODUCT_FS_STRING          "STM32 Virtual ComPort in FS Mode"
+#define USBD_SERIALNUMBER_FS_STRING     "00000000050C"
+#define USBD_CONFIGURATION_HS_STRING    "VCP Config"
+#define USBD_INTERFACE_HS_STRING        "VCP Interface"
+#define USBD_CONFIGURATION_FS_STRING    "VCP Config"
+#define USBD_INTERFACE_FS_STRING        "VCP Interface"
+
 
 /** @defgroup USBD_DESC_Private_Macros
   * @{
diff --git a/stm/lib/usbd_pyb_core.c b/stm/lib/usbd_pyb_core.c
index e2e8c65ca..9c0f1caa0 100644
--- a/stm/lib/usbd_pyb_core.c
+++ b/stm/lib/usbd_pyb_core.c
@@ -71,7 +71,7 @@
 #include "usbd_msc_bot.h"
 #include "usbd_msc_mem.h"
 
-#define USB_PYB_CONFIG_DESC_SIZ 98
+#define USB_PYB_CONFIG_DESC_SIZ (98)
 
 #define MSC_EPIN_SIZE                MSC_MAX_PACKET
 #define MSC_EPOUT_SIZE               MSC_MAX_PACKET
@@ -150,7 +150,7 @@ __ALIGN_BEGIN static uint8_t usbd_pyb_CfgDesc[USB_PYB_CONFIG_DESC_SIZ] __ALIGN_E
     HIBYTE(USB_PYB_CONFIG_DESC_SIZ),
     0x03,   // bNumInterfaces: 3 interfaces
     0x01,   // bConfigurationValue: Configuration value
-    0x00,   // iConfiguration: Index of string descriptor describing the configuration
+    0x04,   // iConfiguration: Index of string descriptor describing the configuration
     0x80,   // bmAttributes: bus powered; 0xc0 for self powered
     0xfa,   // bMaxPower: in units of 2mA
 
@@ -163,7 +163,7 @@ __ALIGN_BEGIN static uint8_t usbd_pyb_CfgDesc[USB_PYB_CONFIG_DESC_SIZ] __ALIGN_E
     0x00,   // bFunctionClass: ?
     0x00,   // bFunctionSubClass: ?
     0x00,   // bFunctionProtocol: ?
-    0x00,   // iFunction: index of string for this function
+    0x04,   // iFunction: index of string for this function
 
     //--------------------------------------------------------------------------
     // Interface Descriptor
@@ -252,9 +252,9 @@ __ALIGN_BEGIN static uint8_t usbd_pyb_CfgDesc[USB_PYB_CONFIG_DESC_SIZ] __ALIGN_E
     USB_INTERFACE_DESCRIPTOR_TYPE,      // bDescriptorType: interface descriptor
     0x02,   // bInterfaceNumber: Number of Interface
     0x00,   // bAlternateSetting: Alternate setting
-    0x02,   // bNumEndpoints*/
+    0x02,   // bNumEndpoints
     0x08,   // bInterfaceClass: MSC Class
-    0x06,   // bInterfaceSubClass : SCSI transparent*/
+    0x06,   // bInterfaceSubClass : SCSI transparent
     0x50,   // nInterfaceProtocol
     0x00,   // iInterface:
 
@@ -397,6 +397,7 @@ static uint8_t usbd_pyb_Setup(void *pdev, USB_SETUP_REQ *req) {
 
         // Standard Device Request ---------------------------------------------
         case (USB_REQ_TYPE_STANDARD | USB_REQ_RECIPIENT_DEVICE):
+            /*
             switch (req->bRequest) {
                 case USB_REQ_GET_DESCRIPTOR:
                 {
@@ -409,6 +410,7 @@ static uint8_t usbd_pyb_Setup(void *pdev, USB_SETUP_REQ *req) {
                     return USBD_CtlSendData(pdev, pbuf, len);
                 }
             }
+            */
             break;
 
         // Standard Interface Request ------------------------------------------