diff --git a/iarm_query_powerstate/IARM_Bus_CheckPowerStatus.c b/iarm_query_powerstate/IARM_Bus_CheckPowerStatus.c
index b0c7eb0..08fa430 100644
--- a/iarm_query_powerstate/IARM_Bus_CheckPowerStatus.c
+++ b/iarm_query_powerstate/IARM_Bus_CheckPowerStatus.c
@@ -81,7 +81,8 @@ int main(int argc, char* argv[])
     int ret = 0;
 
     if (argc > 1) {
-        if (argv[1][1] == 'c') {
+        // Copilot fix: Added bounds check to prevent array out-of-bounds access
+        if (argv[1] && strlen(argv[1]) > 1 && argv[1][1] == 'c') {
             uint32_t res = 0;
             PowerController_PowerState_t curState = POWER_STATE_UNKNOWN, previousState = POWER_STATE_UNKNOWN;
 
@@ -114,7 +115,7 @@ int main(int argc, char* argv[])
             /* Dispose closes RPC conn, do not make any power manager calls after this */
             PowerController_Term();
 
-        } else if (argv[1][1] == 'h') {
+        } else if (argv[1] && strlen(argv[1]) > 1 && argv[1][1] == 'h') {
             usage();
         }
     } else {
@@ -126,8 +127,14 @@ int main(int argc, char* argv[])
         memset(&pwrSettings, 0, sizeof(PWRMgr_Settings_t));
 
         if (fd > 0) {
-            lseek(fd, 0, SEEK_SET);
-            ret = read(fd, &pwrSettings, (sizeof(PWRMgr_Settings_t) - PADDING_SIZE));
+            // Copilot fix: Added lseek error handling and ensured fd is closed in all paths
+            // to prevent resource leak
+            off_t seek_result = lseek(fd, 0, SEEK_SET);
+            if (seek_result < 0) {
+                printf("Error in seeking PWRMgr settings File\n");
+            } else {
+                ret = read(fd, &pwrSettings, (sizeof(PWRMgr_Settings_t) - PADDING_SIZE));
+            }
 
             close(fd);
         }
diff --git a/iarm_set_powerstate/IARM_BUS_SetPowerStatus.c b/iarm_set_powerstate/IARM_BUS_SetPowerStatus.c
index c5caab5..4195fbb 100644
--- a/iarm_set_powerstate/IARM_BUS_SetPowerStatus.c
+++ b/iarm_set_powerstate/IARM_BUS_SetPowerStatus.c
@@ -84,7 +84,8 @@ typedef struct {
 static void* asyncThreadMain(void* arg)
 {
     Controller* controller = (Controller*)arg;
-    usleep((controller->ack - 0.05) * 1000000); // Ack delay minus 50ms
+    // Copilot fix: Changed from floating-point to integer-only arithmetic to prevent overflow
+    usleep((controller->ack * 1000000) - 50000); // Ack delay minus 50ms
     PowerController_PowerModePreChangeComplete(controller->clientId, controller->transactionId);
     return NULL;
 }
diff --git a/key_simulator/IARM_BUS_UIEventSimulator.c b/key_simulator/IARM_BUS_UIEventSimulator.c
index fa52e14..daa3bf9 100644
--- a/key_simulator/IARM_BUS_UIEventSimulator.c
+++ b/key_simulator/IARM_BUS_UIEventSimulator.c
@@ -228,10 +228,15 @@ void sendKeyEventToIARM(int keyType, int keyCode)
 #endif
 
 	printf("Sending Key (%x, %x) from %s\r\n", keyType, keyCode, executableName);
-        printf("%d:%s: Using UINPUT dipatcher", __LINE__, __func__);
+        printf("%d:%s: Using UINPUT dispatcher", __LINE__, __func__);
         uinput_dispatcher_t dispatcher = UINPUT_GetDispatcher();
-        /*Time being replacing scan code with 0 to run the functionality*/
-        dispatcher( keyCode, keyType, 0);
+        // Copilot fix: Added null pointer check to prevent crash when dispatcher is unavailable
+        if (dispatcher != NULL) {
+            /*Time being replacing scan code with 0 to run the functionality*/
+            dispatcher( keyCode, keyType, 0);
+        } else {
+            printf("%d:%s: Error: UINPUT dispatcher not available\n", __LINE__, __func__ );
+        }
 }
 
 /**