How to block or Disable Autorun.inf file in windows xp,Windows 7-Registry Edit

Block Autorun

Depending on the version of Windows that you are using, there are different updates that you must have installed to correctly disable the Autorun functionality:
To disable the Autorun functionality in Windows XP, in Windows Server 2003, or in Windows 2000, you must have security update 950582, update 967715, or update 953252 installed.



Simple way to disable autorun.inf :

Hacking Autorun.inf virus attack|Is autorun.inf virus?

When i  studied second year(cse), my friends told that autorun.inf is virus.  I thought so.  Because my antivirus blocks autorun.inf files.   In third year when i search about autorun.inf file in net, i realize about the auto run file.

 Today i bring some files from my college system.  When i insert the pen drive in my system, there are lot of exe files.They are viruses.  I delete all of them.