I don't know when it happen. The problem is when I inserted a cd in my cd-rom drive...windows not appear option for me to choose that open folder or use program to open file in cd. and autorun is not work,I must click to drive and run program by myself. Is someone have seen this problem before?Can you introduce me to correct this problem? (by not format or use system resotre)

wat kind of cd r u trying to run. if it does it with every cd, there is a problem with the drivers.

Try changing the options with TweakUI.

It's probably just a setting you set earlier and forgot about it. Download and Check TweakUI like Jim said; you should also check your control panel and stuff like that

I think you turned off Auto Insert Notification. I myself have it turned off because I think it's better If you didn't turn it off, then a certain program you installed probably automatically switched it off or you just kept on clicking yes/next during the installation.

Try to get used to it, I think it's better in the long run.

Tweak UI ? umm I'll try ^_^ thanks but about auto insert notification,I turned it on again but it not work .

PS. got to go now ,this day my internet is sooo bad = ="