For those who have the same problem, the solution is start Jenkins as administrator. To do this :
1) open a prompt command as administrator
start/accessories/
Then right click on prompt command and choose start as
2) go to Jenkins directory
cd /D C:\Program Files\Jenkins
3) start Jenkins Server
java -jar jenkins.war --httpPort=8081 not 8080
wait until the sever is running this line will appear INFO:Jenkins is fully up and running
now the Jenkins server is running as administrator
4)open your web browser and go to
http ://localhost:8081
5) create your job!!!
to know where is the workspace just create a new batch script add the command line
cd
save and build the job. Next go to the console and just read the path