To turn off ur autoplay option(for pen drive,cd rom and other other removeable drives)----
1. go to START>>RUN>>then type "gpedit.msc" and press ENTER
2. a window named "group policy" will come.
3. Double click on USER CONFIGERATION>>ADMINISTRATIVE TEMPLATES>>SYSTEM
4.In the right side u will find "Turn Off Autoplay". Double click on it. A window named " turn off autoplay properties" will come.
5.click on ENABLED option and select
"turn of autoply on: all drives."
6. click APPLY and then ok