diff --git a/LunaTranslator/LunaTranslator/LunaTranslator_main.py b/LunaTranslator/LunaTranslator/LunaTranslator_main.py
index 0ce28aaa..d7823e41 100644
--- a/LunaTranslator/LunaTranslator/LunaTranslator_main.py
+++ b/LunaTranslator/LunaTranslator/LunaTranslator_main.py
@@ -1,12 +1,13 @@
-import sys
-from PyQt5.QtCore import Qt
-from PyQt5.QtWidgets import QApplication
-from PyQt5.QtGui import QFont
+import sys, windows
 import platform, os
 
 if __name__ == "__main__":
     dirname = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
     os.chdir(dirname)
+    windows.addenvpath("./LunaTranslator/runtime/")  # win7 no vcredist2015
+    windows.loadlibrary(
+        "./LunaTranslator/runtime/PyQt5/Qt5/bin/Qt5Core.dll"
+    )  # win7 no vcredist2015
     for p in (
         "./userconfig/memory",
         "./userconfig/memory",
@@ -36,6 +37,11 @@ if __name__ == "__main__":
     import gobject
 
     gobject.overridepathexists()
+
+    from PyQt5.QtCore import Qt
+    from PyQt5.QtWidgets import QApplication
+    from PyQt5.QtGui import QFont
+
     QApplication.addLibraryPath(
         "./LunaTranslator/runtime/PyQt5/Qt5/plugins"
     )  # 中文字符下不能自动加载
diff --git a/LunaTranslator/LunaTranslator/windows.py b/LunaTranslator/LunaTranslator/windows.py
index 77fee1e7..1dfc673a 100644
--- a/LunaTranslator/LunaTranslator/windows.py
+++ b/LunaTranslator/LunaTranslator/windows.py
@@ -25,7 +25,7 @@ from ctypes import (
     sizeof,
     byref,
 )
-import ctypes
+import ctypes, os
 from traceback import print_exc
 from ctypes.wintypes import (
     RECT,
@@ -949,3 +949,24 @@ _SetPropW.restype = BOOL
 
 def SetProp(hwnd, string, hdata):
     return _SetPropW(hwnd, string, hdata)
+
+
+_GetEnvironmentVariableW = _kernel32.GetEnvironmentVariableW
+_GetEnvironmentVariableW.argtypes = c_wchar_p, c_wchar_p, DWORD
+_SetEnvironmentVariableW = _kernel32.SetEnvironmentVariableW
+_SetEnvironmentVariableW.argtypes = LPCWSTR, LPCWSTR
+
+
+def addenvpath(path):
+    path = os.path.abspath(path)
+    env = create_unicode_buffer(65535)
+    _GetEnvironmentVariableW("PATH", env, 65535)
+    _SetEnvironmentVariableW("PATH", env.value + ";" + path)
+
+
+_LoadLibraryW = _kernel32.LoadLibraryW
+_LoadLibraryW.argtypes = (LPCWSTR,)
+
+
+def loadlibrary(path):
+    _LoadLibraryW(path)