diff --git a/core/src/main/java/io/xpipe/core/process/CommandProcessControl.java b/core/src/main/java/io/xpipe/core/process/CommandProcessControl.java
index 9c5e8c38..0fa32e01 100644
--- a/core/src/main/java/io/xpipe/core/process/CommandProcessControl.java
+++ b/core/src/main/java/io/xpipe/core/process/CommandProcessControl.java
@@ -58,7 +58,6 @@ public interface CommandProcessControl extends ProcessControl {
     @Override
     CommandProcessControl start() throws Exception;
 
-    @Override
     CommandProcessControl exitTimeout(Integer timeout);
 
     String readOnlyStdout() throws Exception;
diff --git a/core/src/main/java/io/xpipe/core/process/ProcessControl.java b/core/src/main/java/io/xpipe/core/process/ProcessControl.java
index 9261951b..c814645f 100644
--- a/core/src/main/java/io/xpipe/core/process/ProcessControl.java
+++ b/core/src/main/java/io/xpipe/core/process/ProcessControl.java
@@ -24,8 +24,6 @@ public interface ProcessControl extends Closeable, AutoCloseable {
     void close() throws IOException;
     void kill() throws Exception;
 
-    ProcessControl exitTimeout(Integer timeout);
-
     ProcessControl start() throws Exception;
 
     InputStream getStdout();
diff --git a/core/src/main/java/io/xpipe/core/process/ShellProcessControl.java b/core/src/main/java/io/xpipe/core/process/ShellProcessControl.java
index bf3a7f8e..03b2b04e 100644
--- a/core/src/main/java/io/xpipe/core/process/ShellProcessControl.java
+++ b/core/src/main/java/io/xpipe/core/process/ShellProcessControl.java
@@ -35,12 +35,6 @@ public interface ShellProcessControl extends ProcessControl {
         }
     }
 
-    default void executeSimpleCommand(List<String> command) throws Exception {
-        try (CommandProcessControl c = command(command).start()) {
-            c.discardOrThrow();
-        }
-    }
-
     default String executeStringSimpleCommand(ShellType type, String command) throws Exception {
         try (var sub = subShell(type).start()) {
             return sub.executeStringSimpleCommand(command);
diff --git a/core/src/main/java/io/xpipe/core/process/ShellTypes.java b/core/src/main/java/io/xpipe/core/process/ShellTypes.java
index 0eaa788f..d634a157 100644
--- a/core/src/main/java/io/xpipe/core/process/ShellTypes.java
+++ b/core/src/main/java/io/xpipe/core/process/ShellTypes.java
@@ -355,19 +355,23 @@ public class ShellTypes {
 
         @Override
         public String createWhichCommand(String executable) {
-            return "cmd /C where \"" + executable + "\"";
+            return "$LASTEXITCODE=(1 - (Get-Command -erroraction \"silentlycontinue\" \"" + executable + "\").Length)";
         }
 
         @Override
         public Charset determineCharset(ShellProcessControl control) throws Exception {
-            control.writeLine("chcp");
-
             var r = new BufferedReader(new InputStreamReader(control.getStdout(), StandardCharsets.US_ASCII));
+            control.writeLine("If (Get-Command -erroraction 'silentlycontinue' chcp) {chcp} Else {echo \"Not Windows\"}");
+
             // Read echo of command
             r.readLine();
             // Read actual output
             var line = r.readLine();
 
+            if (line.equals("Not Windows")) {
+                return StandardCharsets.UTF_8;
+            }
+
             var matcher = Pattern.compile("\\d+").matcher(line);
             matcher.find();
             return Charset.forName("ibm" + matcher.group());
diff --git a/core/src/main/java/io/xpipe/core/util/SimpleProxyFunction.java b/core/src/main/java/io/xpipe/core/util/SimpleProxyFunction.java
index cca847c5..c9877afb 100644
--- a/core/src/main/java/io/xpipe/core/util/SimpleProxyFunction.java
+++ b/core/src/main/java/io/xpipe/core/util/SimpleProxyFunction.java
@@ -5,6 +5,7 @@ import lombok.SneakyThrows;
 public abstract class SimpleProxyFunction<T> extends ProxyFunction {
 
     @SneakyThrows
+    @SuppressWarnings("unchecked")
     public T getResult() {
         var fields = getClass().getDeclaredFields();
         var last = fields[fields.length - 1];
@@ -13,6 +14,7 @@ public abstract class SimpleProxyFunction<T> extends ProxyFunction {
     }
 
     @SneakyThrows
+    @SuppressWarnings("unchecked")
     public T callAndGet() {
         var result = callAndCopy();
         return ((SimpleProxyFunction<T>) result).getResult();
diff --git a/extension/src/main/java/io/xpipe/extension/util/ApplicationHelper.java b/extension/src/main/java/io/xpipe/extension/util/ApplicationHelper.java
new file mode 100644
index 00000000..f15d89f0
--- /dev/null
+++ b/extension/src/main/java/io/xpipe/extension/util/ApplicationHelper.java
@@ -0,0 +1,18 @@
+package io.xpipe.extension.util;
+
+import io.xpipe.core.process.ShellProcessControl;
+
+import java.io.IOException;
+
+public class ApplicationHelper {
+
+    public static boolean isInPath(ShellProcessControl processControl, String executable) throws Exception {
+        return processControl.executeBooleanSimpleCommand(processControl.getShellType().createWhichCommand(executable));
+    }
+
+    public static void checkSupport(ShellProcessControl processControl, String executable, String displayName) throws Exception {
+        if (!isInPath(processControl, executable)) {
+            throw new IOException(displayName + " executable " + executable + " not found in PATH");
+        }
+    }
+}
diff --git a/extension/src/main/java/io/xpipe/extension/util/ExpectHelper.java b/extension/src/main/java/io/xpipe/extension/util/ExpectHelper.java
deleted file mode 100644
index ec94d7af..00000000
--- a/extension/src/main/java/io/xpipe/extension/util/ExpectHelper.java
+++ /dev/null
@@ -1,41 +0,0 @@
-package io.xpipe.extension.util;
-
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.StandardCopyOption;
-import java.util.List;
-import java.util.stream.Collectors;
-
-public class ExpectHelper {
-
-    private static Path extractedExecutable = null;
-
-    private  static Path getExtractedExecutable() {
-        if (extractedExecutable == null) {
-            XPipeDaemon.getInstance().withResource("io.xpipe.extension", "bin/expect.exe", path -> {
-                extractedExecutable = Files.createTempFile(null, ".exe");
-                Files.copy(path, extractedExecutable, StandardCopyOption.REPLACE_EXISTING);
-            });
-        }
-
-        return extractedExecutable;
-    }
-
-    public static List<String> executeExpect(List<String> command, String password) throws IOException {
-        var file = Files.createTempFile(null, ".lua");
-        Files.writeString(file, expectFile(command, password));
-        return List.of(getExtractedExecutable().toString(), file.toString());
-    }
-
-    private static String expectFile(List<String> command, String password) {
-        return String.format("""
-                        echo(false)
-                        if spawn(%s) then
-                            expect(":")
-                            sendln("%s")
-                        	echo(true)
-                        end
-                        """, command.stream().map(s -> "\"" + s + "\"").collect(Collectors.joining(", ")), password);
-    }
-}