diff --git a/win/setup.ps1 b/win/setup.ps1
index 2b694d0..c7e7e77 100644
--- a/win/setup.ps1
+++ b/win/setup.ps1
@@ -1,10 +1,11 @@
+# execute this first
+Set-ExecutionPolicy RemoteSigned
+
 if (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
     Start-Process PowerShell -Verb RunAs "-NoProfile -ExecutionPolicy Bypass -Command `"cd '$pwd'; & '$PSCommandPath';`"";
     exit;
 }
 
-Set-ExecutionPolicy RemoteSigned
-
 # link config files
 $dotfiles=(Get-Item $PSScriptRoot).Parent.FullName
 New-Item -ItemType SymbolicLink -Target $dotfiles\win\profile.ps1 -Path $profile -Force
@@ -17,7 +18,9 @@ if (Test-Path $sshconf -PathType Leaf) {
 }
 
 # fix Shift key toggling Cn/En fro MS wubi
-$wubiAction = New-ScheduledTaskAction -Execute 'Powershell.exe' `
-  -Argument "-NoProfile -WindowStyle Hidden -File $PSScriptRoot\wubi-no-shift.ps1"
-$wubiTrigger = New-ScheduledTaskTrigger -AtLogOn
-Register-ScheduledTask -Action $wubiAction -Trigger $wubiTrigger -TaskName "Wubi No Shift" -Description "Disable Shift key toggling CN/EN" -RunLevel Highest
\ No newline at end of file
+if (-not (Get-ScheduledTask -TaskName "Wubi No Shift")) {
+  $wubiAction = New-ScheduledTaskAction -Execute 'Powershell.exe' `
+    -Argument "-NoProfile -WindowStyle Hidden -File $PSScriptRoot\wubi-no-shift.ps1"
+  $wubiTrigger = New-ScheduledTaskTrigger -AtLogOn
+  Register-ScheduledTask -Action $wubiAction -Trigger $wubiTrigger -TaskName "Wubi No Shift" -Description "Disable Shift key toggling CN/EN" -RunLevel Highest
+}
\ No newline at end of file