DLN

When I create a file name and change it's name to autorun.inf or boot.exe, I don't see it any more in windows explorer (it disappears). But when I create a new file and try to rename it to autorun.inf or boot.exe, I receive a error message that the file I try to rename to has already existed. I have check the options to show hidden file and system file in windows explorer option but I still can't see the file I've created even thought I can see some other common hidden/system file like autoexec.bat, boot.ini, ntdetect.com, io.sys, config.sys,... in windows explorer. I use some text editor and I can open the file with name above (autorun.inf and boot.exe) by type it's name from the open file dialog (I still can't see this file). After modify it content, I run cmd and when I type command

type autorun.inf (let's say the file I've modified is autorun.inf, the same happen to the file with the name boot.exe)

I see the the file's content. Then I type command

del autorun.inf

I receive the message "Could not find autorun.inf"

Also when I insert a CD-ROM to my drive, if the CD content the file autorun.inf, I can not see it content from windows explorer

Does anybody know if this is a virus or I have misconfiged the autorun/autoplay policy? And how can I fix this?