diff --git a/Mkfiles/vc10/genperf/run.bat b/Mkfiles/vc10/genperf/run.bat
index 775f1d0a..f67049da 100644
--- a/Mkfiles/vc10/genperf/run.bat
+++ b/Mkfiles/vc10/genperf/run.bat
@@ -1,14 +1,14 @@
 cd ..\..\..
 @echo off
 
-for /f "usebackq tokens=1*" %%f in (`reg query HKCR\Applications\python.exe\shell\open\command`) do (set _my_=%%f %%g)
+for /f "usebackq tokens=1*" %%f in (`reg query HKCR\Applications\python.exe\shell\open\command 2^>NUL`) do (set _my_=%%f %%g)
 goto try1%errorlevel%
 
 :try10
 goto ok
 
 :try11
-for /f "usebackq tokens=1*" %%f in (`reg query HKCR\Python.File\shell\open\command`) do (set _my_=%%f %%g)
+for /f "usebackq tokens=1*" %%f in (`reg query HKCR\Python.File\shell\open\command 2^>NUL`) do (set _my_=%%f %%g)
 goto try2%errorlevel%
 
 :try20: