title: Wix: Issue while opening installer
body: <p>Posting this again as my previous question I think has expired.</p>
  
  <p>Sometimes my wix installer gives an error that looks something like:</p>
  
  <p>This installation package could not be opened. Verify that this is a valid Windows package.</p>
  
  <p>What does this mean? Looks like this is an error thrown by the msiexec program to indicate a corrupted install package or software.</p>
  
  <p>Is there something we can do from a code/wix perspective to handle this?...even though this seems to be more of a file corruption issue.</p>
  
  <p>This is what I see when I run verbose logging while installing.</p>
  
  <p>I checked the md5 hash for both the installer on the machine and others, they do match.</p>
  
  <pre><code>=== Verbose logging started: 10/16/2013  6:36:20  Build type: SHIP UNICODE 5.00.7601.00  Calling process: C:\Windows\system32\msiexec.exe ===
  MSI (c) (3C:D8) [06:36:20:134]: Font created.  Charset: Req=0, Ret=0, Font: Req=MS Shell Dlg, Ret=MS Shell Dlg
  
  MSI (c) (3C:D8) [06:36:20:134]: Font created.  Charset: Req=0, Ret=0, Font: Req=MS Shell Dlg, Ret=MS Shell Dlg
  
  MSI (c) (3C:24) [06:36:20:134]: Resetting cached policy values
  MSI (c) (3C:24) [06:36:20:134]: Machine policy value 'Debug' is 0
  MSI (c) (3C:24) [06:36:20:134]: ******* RunEngine:
             ******* Product: MyServer.msi
             ******* Action: 
             ******* CommandLine: **********
  MSI (c) (3C:24) [06:36:20:134]: Incrementing counter to disable shutdown. Counter after increment: 0
  MSI (c) (3C:24) [06:36:20:150]: Machine policy value 'DisableUserInstalls' is 0
  MSI (c) (3C:24) [06:36:20:150]: Note: 1: 1402 2: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer 3: 2 
  MSI (c) (3C:24) [06:36:20:150]: Decrementing counter to disable shutdown. If counter &gt;= 0, shutdown will be denied.  Counter after decrement: -1
  MSI (c) (3C:24) [06:36:20:150]: MainEngineThread is returning 2
  === Verbose logging stopped: 10/16/2013  6:36:20 ===
  </code></pre>