I am using windows 7 ultimate. When i login or shut down I cant hear any music. I have a acer laptop. There is no problem with the sound card. I can play songs in windows media player and it works just fine. Its only the login and shutdown sounds. Please help on how i can enable them.

Windows Vista was introduced a while ago as an upgrade to the Windows XP and 2000 users as something more tactile, easier to use – packed with security features that will ensure the safety of your work and your operating system experience. It was also more flashy, more user friendly and gained a lot of popularity because of its more palpable interface. Though it had some compatibility issues when it was first released, Windows Vista has really come ahead in the game and has become the solution for many computer users all over the world. But of course, Windows Vista is built on the same principles as the previous versions of the OS and because of that, it is inevitably an imperfect superstructure. A word of caution here – no OS is perfect because of the degradation effects of technology and the human element in the mix. There are actually quite a few common Windows Vista error messages and this article will discuss how to troubleshoot them if you ever encounter any of them.
The solution is no different from the solution that was available for previous editions of Microsoft’s incarnations. The common element here is the registry, and Windows Vista still operates with the registry as the integral matrix that it uses to ensure that all operations within its operating system environment run smoothly. With the registry, no matter how advanced the OS, common problems will always occur. When ever you introduce third party software and programs in Windows Vista, you will introduce the potential of new problems, especially in the registry. Bad registry keys left by rogue programs, invalid entries left by incomplete uninstalls and orphan keys are still features of an unhealthy Windows registry – be it XP or Vista. Surprised? Don’t be. Microsoft invented the registry for the simple fact that all executions in the computer need a reference point and all instructions for the different programs need somewhere to be stored. It hasn’t changed at all.
The same problems that made those runtime errors, mediahub errors and Active X errors still exist in Windows Vista, and would most likely still exist in future incarnations of Windows. The good thing about most of the registry cleaners is that they have adapted to the new operating system and is compatible with the new code and language that Vista is using. A quick look on the internet reveals many registry cleaners that have the ability to interface with Windows Vista and solve the problems that its registry might incur. Another good thing is that Vista has some bespoke problems that did not exist in XP, mainly because of the new security code and program structure that is being used by the operating system. Registry cleaners have adjusted to this and responded with more feature packed cleaners. Troubleshooting common Windows Vista error messages is now easy with the new stable of registry cleaners out there. Don’t make the mistake of thinking that a new OS means a trouble free registry; you still need dedicated programs to deal with the problems associated with it.