title: Cannot start Jenkins
body: <p>After downloading a plugin, the Jenkins server cannot be accessed. I am using windows 7.
  I tried to start windows Jenkins service manually, but I get the following message:</p>
  
  <blockquote>
    <p>"Windows could not start the Jenkins service on Local COmputer. Error
    1067: The process terminated unexpectedly"</p>
  </blockquote>
  
  <p>I also tried to run the jenkins.exe from the installation directory, but with no success.
  In the error logs I see the following:</p>
  
  <pre><code>INFO: Obtained the updated data file for hudson.tasks.Maven.MavenInstaller
  Ιουν 06, 2014 11:31:46 ΠΜ hudson.model.DownloadService$Downloadable doPostBack
  INFO: Obtained the updated data file for hudson.tools.JDKInstaller
  Ιουν 06, 2014 11:32:18 ΠΜ hudson.model.UpdateCenter doSafeRestart
  INFO: Scheduling Jenkins reboot
  Ιουν 06, 2014 11:33:00 ΠΜ hudson.model.UpdateCenter$DownloadJob run
  INFO: Starting the installation of FTP-Publisher Plugin on behalf of anonymous
  Ιουν 06, 2014 11:33:15 ΠΜ hudson.model.UpdateCenter doRestart
  INFO: Scheduling the core downgrade
  Ιουν 06, 2014 11:33:25 ΠΜ hudson.model.UpdateCenter$UpdateCenterConfiguration download
  INFO: Downloading FTP-Publisher Plugin
  Ιουν 06, 2014 11:33:26 ΠΜ hudson.model.UpdateCenter$HudsonDowngradeJob run
  INFO: Starting the downgrade of jenkins.war on behalf of anonymous
  Ιουν 06, 2014 11:33:26 ΠΜ jenkins.model.Jenkins$24 run
  INFO: Restart in 10 seconds
  Ιουν 06, 2014 11:33:26 ΠΜ hudson.model.UpdateCenter$HudsonDowngradeJob run
  INFO: Downgrading successful: jenkins.war
  Ιουν 06, 2014 11:33:36 ΠΜ jenkins.model.Jenkins$24 run
  SEVERE: Restarting VM as requested by anonymous
  Error: Unable to access jarfile D:\Program Files (x86)\Jenkins\jenkins.war
  Error: Unable to access jarfile D:\Program Files (x86)\Jenkins\jenkins.war
  Error: Unable to access jarfile D:\Program Files (x86)\Jenkins\jenkins.war
  </code></pre>
  
  <p>Can anyone help? We are at release point, and I have nowhere to run my tests..</p>