diff --git a/apps/desktop/src-tauri/src/agent.rs b/apps/desktop/src-tauri/src/agent.rs
index 88fe5cc..dc2126b 100644
--- a/apps/desktop/src-tauri/src/agent.rs
+++ b/apps/desktop/src-tauri/src/agent.rs
@@ -699,28 +699,22 @@ fn collect_windows_extended() -> serde_json::Value {
     }
 
     fn parse_powershell_json(bytes: &[u8]) -> Option<serde_json::Value> {
-        if bytes.is_empty() {
+        let text = decode_powershell_text(bytes)?;
+        if text.is_empty() {
             return None;
         }
-        if bytes.starts_with(&[0xFF, 0xFE]) {
-            return parse_utf16_le_bytes(&bytes[2..]);
-        }
-        if bytes.len() >= 2 && bytes[1] == 0 {
-            if let Some(val) = parse_utf16_le_bytes(bytes) {
-                return Some(val);
+        match serde_json::from_str::<serde_json::Value>(&text) {
+            Ok(value) => Some(value),
+            Err(err) => {
+                if cfg!(test) {
+                    let preview = text.chars().take(512).collect::<String>();
+                    eprintln!(
+                        "[collect_windows_extended] falha ao interpretar JSON: {err}; amostra: {preview}"
+                    );
+                }
+                None
             }
         }
-        if bytes.contains(&0) {
-            if let Some(val) = parse_utf16_le_bytes(bytes) {
-                return Some(val);
-            }
-        }
-        let text = std::str::from_utf8(bytes).ok()?;
-        let trimmed = text.trim();
-        if trimmed.is_empty() {
-            return None;
-        }
-        serde_json::from_str(trimmed).ok()
     }
 
     fn decode_powershell_text(bytes: &[u8]) -> Option<String> {
@@ -740,7 +734,12 @@ fn collect_windows_extended() -> serde_json::Value {
                 return Some(s);
             }
         }
-        std::str::from_utf8(bytes).map(|s| s.to_string()).ok()
+        let text = std::str::from_utf8(bytes).ok()?.trim().to_string();
+        if text.is_empty() {
+            None
+        } else {
+            Some(text)
+        }
     }
 
     fn decode_utf16_le_to_string(bytes: &[u8]) -> Option<String> {
@@ -751,9 +750,13 @@ fn collect_windows_extended() -> serde_json::Value {
             .chunks_exact(2)
             .map(|chunk| u16::from_le_bytes([chunk[0], chunk[1]]))
             .collect();
-        String::from_utf16(&utf16)
-            .ok()
-            .map(|s| s.trim().to_string())
+        let text = String::from_utf16(&utf16).ok()?;
+        let trimmed = text.trim();
+        if trimmed.is_empty() {
+            None
+        } else {
+            Some(trimmed.to_string())
+        }
     }
 
     fn encode_ps_script(script: &str) -> String {
@@ -781,15 +784,23 @@ fn collect_windows_extended() -> serde_json::Value {
             .arg(encoded)
             .output()
             .ok()?;
-        if out.stdout.is_empty() {
-            if cfg!(test) && !out.stderr.is_empty() {
+        let stdout_text = decode_powershell_text(&out.stdout);
+        if cfg!(test) {
+            if let Some(ref txt) = stdout_text {
+                let preview = txt.chars().take(512).collect::<String>();
+                eprintln!("[collect_windows_extended] stdout `{cmd}` => {preview}");
+            } else {
+                eprintln!("[collect_windows_extended] stdout `{cmd}` => <vazio>");
+            }
+            if !out.stderr.is_empty() {
                 if let Some(err) = decode_powershell_text(&out.stderr) {
-                    eprintln!("[collect_windows_extended] PowerShell stderr for `{cmd}`: {err}");
+                    eprintln!("[collect_windows_extended] stderr `{cmd}` => {err}");
+                } else {
+                    eprintln!("[collect_windows_extended] stderr `{cmd}` => <binário>");
                 }
             }
-            return None;
         }
-        parse_powershell_json(&out.stdout)
+        stdout_text.and_then(|text| serde_json::from_str::<serde_json::Value>(&text).ok())
     }
 
     let software = ps(r#"@(Get-ItemProperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*'; Get-ItemProperty 'HKLM:\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*') | Where-Object { $_.DisplayName } | Select-Object DisplayName, DisplayVersion, Publisher"#)