diff --git a/server/src/core/file_mgr.rs b/server/src/core/file_mgr.rs
index f113bc67..e64918d6 100644
--- a/server/src/core/file_mgr.rs
+++ b/server/src/core/file_mgr.rs
@@ -1,15 +1,15 @@
-use lsp_types::notification::{Notification, PublishDiagnostics};
 use ropey::Rope;
 use ruff_python_ast::{ModModule, PySourceType, Stmt};
 use ruff_python_parser::{Parsed, Token, TokenKind};
 use lsp_types::{Diagnostic, DiagnosticSeverity, MessageType, NumberOrString, Position, PublishDiagnosticsParams, Range, TextDocumentContentChangeEvent};
+use lsp_types::notification::{Notification, PublishDiagnostics};
 use tracing::{error, warn};
 use std::collections::hash_map::DefaultHasher;
 use std::collections::HashSet;
 use std::hash::{Hash, Hasher};
 use std::path::PathBuf;
 use std::str::FromStr;
-use std::sync::Arc;
+use std::sync::{atomic::{AtomicBool, Ordering}, Arc, OnceLock};
 use std::{collections::HashMap, fs};
 use crate::core::config::{DiagnosticFilter, DiagnosticFilterPathType};
 use crate::core::diagnostics::{create_diagnostic, DiagnosticCode, DiagnosticSetting};
@@ -24,6 +24,13 @@ use ruff_text_size::{Ranged, TextRange};
 
 use super::odoo::SyncOdoo;
 
+// Global static for legacy UNC path detection
+pub static LEGACY_UNC_PATHS: OnceLock<AtomicBool> = OnceLock::new();
+
+pub fn legacy_unc_paths() -> &'static AtomicBool {
+    LEGACY_UNC_PATHS.get_or_init(|| AtomicBool::new(false))
+}
+
 #[derive(Debug, PartialEq, Clone)]
 pub enum NoqaInfo {
     None,
@@ -616,18 +623,37 @@ impl FileMgr {
         if cfg!(windows) {
             slash = "/";
         }
-        let pre_uri = match url::Url::parse(&format!("file://{}{}", slash, s)) {
-            Ok(pre_uri) => pre_uri,
+        // If the path starts with \\\\, we want to remove it and also set slash to empty string
+        // Such that we have file://wsl.localhost/<path> for example
+        // For normal paths we do want file:///C:/...
+        // For some editors like PyCharm they use the legacy windows UNC urls so we have file:////wsl.localhost/<path>
+        let (replaced, unc) = if s.starts_with("\\\\") {
+            slash = "";
+            (s.replacen("\\\\", "", 1), true)
+        } else {
+            (s.clone(), false)
+        };
+        // Use legacy UNC flag to determine if we need four slashes
+        let mut pre_uri = match url::Url::parse(&format!("file://{}{}", slash, replaced)) {
+            Ok(pre_uri) => pre_uri.to_string(),
             Err(err) => panic!("unable to transform pathname to uri: {s}, {}", err)
         };
-        match lsp_types::Uri::from_str(pre_uri.as_str()) {
+        if unc && legacy_unc_paths().load(Ordering::Relaxed){
+            pre_uri = pre_uri.replace("file://", "file:////");
+        }
+        match lsp_types::Uri::from_str(&pre_uri) {
             Ok(url) => url,
             Err(err) => panic!("unable to transform pathname to uri: {s}, {}", err)
         }
     }
 
     pub fn uri2pathname(s: &str) -> String {
-        if let Ok(url) = url::Url::parse(s) {
+        // Detect legacy UNC path (file:////)
+        if s.starts_with("file:////") {
+            legacy_unc_paths().store(true, Ordering::Relaxed);
+        }
+        let str_repr = s.replace("file:////", "file://");
+        if let Ok(url) = url::Url::parse(&str_repr) {
             if let Ok(url) = url.to_file_path() {
                 return url.sanitize();
             }
diff --git a/server/src/utils.rs b/server/src/utils.rs
index 85902788..7ce0cce6 100644
--- a/server/src/utils.rs
+++ b/server/src/utils.rs
@@ -1,8 +1,10 @@
-use std::{collections::HashMap, fs::{self, DirEntry}, path::{Path, PathBuf}, str::FromStr, sync::LazyLock};
+use crate::core::file_mgr::legacy_unc_paths;
 use path_slash::{PathBufExt, PathExt};
 use regex::Regex;
 use ruff_text_size::TextSize;
 use std::process::Command;
+use std::sync::atomic::Ordering;
+use std::{collections::HashMap, fs::{self, DirEntry}, path::{Path, PathBuf}, str::FromStr, sync::LazyLock};
 
 use crate::{constants::Tree, oyarn};
 
@@ -135,12 +137,16 @@ pub trait ToFilePath {
 }
 
 impl ToFilePath for lsp_types::Uri {
-
     fn to_file_path(&self) -> Result<PathBuf, ()> {
-        let url = url::Url::from_str(self.as_str()).map_err(|_| ())?;
+        let s = self.as_str();
+        // Detect legacy UNC path (file:////)
+        if s.starts_with("file:////") {
+            legacy_unc_paths().store(true, Ordering::Relaxed);
+        }
+        let str_repr = s.replace("file:////", "file://");
+        let url = url::Url::from_str(&str_repr).map_err(|_| ())?;
         url.to_file_path()
     }
-
 }
 
 pub trait PathSanitizer {