Having problems with your Acer ASPIRE 5720-4649 Notebook ?

After turn on goes to black screen says missing operating system

Answers :

That sounds like a serious issue either with the operating system or the hard drive itself. The best place to start is to determine if your system came with a Windows installation disc. If so, you might be able to perform a repair installation that does not affect any of the programs or files already existing on the computer. If you don't have a Windows installation disc but have an Acer restore CD or a restore partition on the hard drive, there's a very good chance running that will wipe out everything on the hard drive and restore it to factory fresh condition. If that appears to be the only option, you may have to take the hard drive to a friend or repair facility that can backup your personal data to DVD before running the restore CD.

Something is horribly wrong on your pc: either the hard disk (or the hard disk's controller) has suffered a catastrophic failure or Windows was totally wiped out by malware.
Try booting from a Linux Live-Cd like  http://www.pclinuxos.com/  and, as it starts to boot, press the ESC key and you will see the boot log in real time: look for error messages. If there aren't any and you are later able to access the hard disk then it's probably ok. In that case reinstall Windows or even the PCLinuxOS if you've liked it.
Repair Help & Product Troubleshooting for Acer ASPIRE 5720-4649 Notebook

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