diff --git a/launcher/launcher-user.bat b/launcher/launcher-user.bat
index 224ea4eb..3efd9214 100644
--- a/launcher/launcher-user.bat
+++ b/launcher/launcher-user.bat
@@ -7,7 +7,7 @@ set NAPCAT_LAUNCHER_PATH=%cd%\NapCatWinBootMain.exe
 set NAPCAT_MAIN_PATH=%cd%\napcat.mjs
 :loop_read
 for /f "tokens=2*" %%a in ('reg query "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\QQ" /v "UninstallString"') do (
-    set RetString=%%b
+     set "RetString=%%~b"
     goto :napcat_boot
 )
 
@@ -16,7 +16,7 @@ for %%a in ("%RetString%") do (
     set "pathWithoutUninstall=%%~dpa"
 )
 
-SET QQPath=%pathWithoutUninstall%QQ.exe
+set "QQPath=%pathWithoutUninstall%QQ.exe"
 
 if not exist "%QQpath%" (
     echo provided QQ path is invalid
diff --git a/launcher/launcher-win10-user.bat b/launcher/launcher-win10-user.bat
index 84050e0b..76cac126 100644
--- a/launcher/launcher-win10-user.bat
+++ b/launcher/launcher-win10-user.bat
@@ -7,7 +7,7 @@ set NAPCAT_LAUNCHER_PATH=%cd%\NapCatWinBootMain.exe
 set NAPCAT_MAIN_PATH=%cd%\napcat.mjs
 :loop_read
 for /f "tokens=2*" %%a in ('reg query "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\QQ" /v "UninstallString"') do (
-    set RetString=%%b
+    set "RetString=%%~b"
     goto :napcat_boot
 )
 
@@ -16,7 +16,7 @@ for %%a in ("%RetString%") do (
     set "pathWithoutUninstall=%%~dpa"
 )
 
-SET QQPath=%pathWithoutUninstall%QQ.exe
+set "QQPath=%pathWithoutUninstall%QQ.exe"
 
 if not exist "%QQpath%" (
     echo provided QQ path is invalid
diff --git a/launcher/launcher-win10.bat b/launcher/launcher-win10.bat
index 8e458178..7b8afa79 100644
--- a/launcher/launcher-win10.bat
+++ b/launcher/launcher-win10.bat
@@ -16,7 +16,7 @@ set NAPCAT_LAUNCHER_PATH=%cd%\NapCatWinBootMain.exe
 set NAPCAT_MAIN_PATH=%cd%\napcat.mjs
 :loop_read
 for /f "tokens=2*" %%a in ('reg query "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\QQ" /v "UninstallString"') do (
-    set RetString=%%b
+    set "RetString=%%~b"
     goto :napcat_boot
 )
 
@@ -25,7 +25,7 @@ for %%a in ("%RetString%") do (
     set "pathWithoutUninstall=%%~dpa"
 )
 
-SET QQPath=%pathWithoutUninstall%QQ.exe
+set "QQPath=%pathWithoutUninstall%QQ.exe"
 
 if not exist "%QQPath%" (
     echo provided QQ path is invalid
diff --git a/launcher/launcher.bat b/launcher/launcher.bat
index 970a7edd..845c86ae 100644
--- a/launcher/launcher.bat
+++ b/launcher/launcher.bat
@@ -16,7 +16,7 @@ set NAPCAT_LAUNCHER_PATH=%cd%\NapCatWinBootMain.exe
 set NAPCAT_MAIN_PATH=%cd%\napcat.mjs
 :loop_read
 for /f "tokens=2*" %%a in ('reg query "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\QQ" /v "UninstallString"') do (
-    set RetString=%%b
+    set "RetString=%%~b"
     goto :napcat_boot
 )
 
@@ -25,7 +25,7 @@ for %%a in ("%RetString%") do (
     set "pathWithoutUninstall=%%~dpa"
 )
 
-SET QQPath=%pathWithoutUninstall%QQ.exe
+set "QQPath=%pathWithoutUninstall%QQ.exe"
 
 if not exist "%QQPath%" (
     echo provided QQ path is invalid