Autorun.inf with UTF-8 BOM is not recognized by windows autoplay/autorun

Issue:

 

When I create a Autorun.inf for a CD-ROM, Win 7 won't automatically "run" the setup.exe.

 

My sample autorun.inf:

[autorun]
action=Autorun
open=Setup.exe
icon=Setup.exe,0
label=XXX Install CD

 

 

Troubleshooting:

 

First I have confirmed that nothing is wrong with my Win 7. The autorun is not disabled. For all related registry settings, please refer to this WIKIPEDIA article:

http://en.wikipedia.org/wiki/AutoRun#Inf_handling

 

 

After the registration are confirmed that AUTORUN is enabled, I still cannot make the "setup.exe" run. Win 7 only prompts to "Open Files" as below.

 

Cause:

 

I noticed that the ICON and the label are not shown as expected as well. Then I doubt if something is wrong with the autorun.inf file.

 

I checked the encoding of autorun.inf and found it's encoded in UTF-8 with BOM (default by my vim settings).

 

After I change the encoding to ACSII, the autoplay/autorun finally starts working.

 

 

Conclusion:

 

Windown 7 autoplay/autorun cannot handle autorun.inf file in UTF-8 with BOM.