diff --git a/src/main/kotlin/com/lambda/client/LambdaCoreMod.kt b/src/main/kotlin/com/lambda/client/LambdaCoreMod.kt
index a5468f79b..29de461cb 100644
--- a/src/main/kotlin/com/lambda/client/LambdaCoreMod.kt
+++ b/src/main/kotlin/com/lambda/client/LambdaCoreMod.kt
@@ -34,7 +34,7 @@ class LambdaCoreMod : IFMLLoadingPlugin {
         MixinBootstrap.init()
         Mixins.addConfigurations("mixins.lambda.json", "mixins.baritone.json")
 
-        PluginManager.getLoaders()
+        PluginManager.checkPluginLoaders(PluginManager.getLoaders())
             .filter { it.info.mixins.isNotEmpty() }
             .forEach {
                 logger.info("Initialised mixins of ${it.info.name}.")
diff --git a/src/main/kotlin/com/lambda/client/plugin/PluginError.kt b/src/main/kotlin/com/lambda/client/plugin/PluginError.kt
index 995099e3c..7c1638021 100644
--- a/src/main/kotlin/com/lambda/client/plugin/PluginError.kt
+++ b/src/main/kotlin/com/lambda/client/plugin/PluginError.kt
@@ -7,6 +7,7 @@ import java.io.File
 internal enum class PluginError {
     HOT_RELOAD,
     DUPLICATE,
+    DEPRECATED,
     UNSUPPORTED,
     REQUIRED_PLUGIN,
     OUTDATED_PLUGIN,
@@ -23,6 +24,9 @@ internal enum class PluginError {
             DUPLICATE -> {
                 log("Duplicate plugin $loader.")
             }
+            DEPRECATED -> {
+                log("Plugin $loader is deprecated due to the presence of a newer version: $message")
+            }
             UNSUPPORTED -> {
                 log("Unsupported plugin $loader. Minimum required Lambda version: ${loader.info.minApiVersion}")
             }
@@ -46,7 +50,15 @@ internal enum class PluginError {
             }
         }
 
-        loader.file.renameTo(File("${loader.file.path}.disabled"))
+        // append .disabled to the file name
+        // if a file with the same name exists, append a number to the end
+        var disabledFile = File("${loader.file.path}.disabled")
+        var i = 1
+        while (disabledFile.exists()) {
+            disabledFile = File("${loader.file.path}.disabled$i")
+            i++
+        }
+        loader.file.renameTo(disabledFile)
     }
 
     fun log(message: String?, throwable: Throwable? = null) {
diff --git a/src/main/kotlin/com/lambda/client/plugin/PluginManager.kt b/src/main/kotlin/com/lambda/client/plugin/PluginManager.kt
index 19c65c3d1..739d074f0 100644
--- a/src/main/kotlin/com/lambda/client/plugin/PluginManager.kt
+++ b/src/main/kotlin/com/lambda/client/plugin/PluginManager.kt
@@ -9,10 +9,12 @@ import com.lambda.client.plugin.api.Plugin
 import com.lambda.client.util.FolderUtils
 import com.lambda.client.util.text.MessageSendHelper
 import kotlinx.coroutines.Deferred
+import net.minecraft.launchwrapper.Launch
 import net.minecraft.util.text.TextFormatting
 import org.apache.maven.artifact.versioning.DefaultArtifactVersion
 import java.io.File
 import java.io.FileNotFoundException
+import java.util.jar.JarFile
 
 internal object PluginManager : AsyncLoader<List<PluginLoader>> {
     override var deferred: Deferred<List<PluginLoader>>? = null
@@ -79,6 +81,8 @@ internal object PluginManager : AsyncLoader<List<PluginLoader>> {
                 invalids.add(loader)
             }
 
+            if (invalids.contains(loader)) continue
+
             // Duplicate check
             if (loadedPluginLoader.contains(loader)) {
                 loadedPlugins.firstOrNull { loader.name == it.name }?.let { plugin ->
@@ -107,11 +111,15 @@ internal object PluginManager : AsyncLoader<List<PluginLoader>> {
                             PluginError.DUPLICATE.handleError(it)
                             invalids.add(it)
                         }
+
                         nowVersion > thenVersion -> {
                             upgradeLoader = true
+                            PluginError.DEPRECATED.handleError(it, loader.toString())
                             invalids.add(it)
                         }
+
                         else -> {
+                            PluginError.DEPRECATED.handleError(loader, it.toString())
                             invalids.add(loader)
                         }
                     }
@@ -162,9 +170,11 @@ internal object PluginManager : AsyncLoader<List<PluginLoader>> {
                     is ClassNotFoundException -> {
                         PluginError.CLASS_NOT_FOUND.handleError(loader, throwable = it)
                     }
+
                     is IllegalAccessException -> {
                         PluginError.ILLEGAL_ACCESS.handleError(loader, throwable = it)
                     }
+
                     else -> {
                         PluginError.OTHERS.handleError(loader, throwable = it)
                     }