diff --git a/Bloxstrap/Bootstrapper.cs b/Bloxstrap/Bootstrapper.cs
index aa71eff..010b16c 100644
--- a/Bloxstrap/Bootstrapper.cs
+++ b/Bloxstrap/Bootstrapper.cs
@@ -691,6 +691,32 @@ namespace Bloxstrap
             }
         }
 
+        private void KillRunningRobloxInDirectory(string path)
+        {
+            const string LOG_IDENT = "Bootstrapper::KillRunningRobloxInDirectory";
+
+            List<Process> processes = new List<Process>();
+            processes.AddRange(Process.GetProcessesByName(IsStudioLaunch ? "RobloxStudioBeta" : "RobloxPlayerBeta"));
+            processes.AddRange(Process.GetProcessesByName("RobloxCrashHandler"));
+
+            foreach (Process process in processes)
+            {
+                string? processPath = process.MainModule?.FileName;
+                if (processPath != null && processPath.StartsWith(path))
+                {
+                    try
+                    {
+                        process.Kill();
+                    }
+                    catch (Exception ex)
+                    {
+                        App.Logger.WriteLine(LOG_IDENT, $"Failed to close process {process.Id} at {processPath}");
+                        App.Logger.WriteException(LOG_IDENT, ex);
+                    }
+                }
+            }
+        }
+
         private async Task UpgradeRoblox()
         {
             const string LOG_IDENT = "Bootstrapper::UpgradeRoblox";
@@ -706,6 +732,9 @@ namespace Bloxstrap
 
             _isInstalling = true;
 
+            // make sure nothing is running from the latest version directory before deleting the whole directory
+            KillRunningRobloxInDirectory(_latestVersionDirectory);
+
             if (Directory.Exists(_latestVersionDirectory))
             {
                 try