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Please check that your cd or dvd drive does not contain any disks when attempting to boot. This can sometimes cause boot problems. The other problem you may be experiencing is hard drive failure. This can be caused by the hard drive loosing its configuration from wear or failure. Perhaps you have an extra hard drive laying around you can test to see if you get same error. Thanks And GOOD LUCK!
While turning on your laptop keep tapping the F8 key...It will give you Advanced boot options...Select Safe mode frm the menu ... it will go to the safe mode ... then try to do a system restore to the date when it was working fine...Best of luck.
Try this: -
Remove your Laptop Li-ion battery module. Then remove the RTC battery for at least 15min. Replace RTC, and boot the computer ONLY with the AC-Adapter. Enter the BIOS and set to boot from USB
The BIOS, which handles the initial start up of your computer, cannot find your hard drive and thus cannot boot your operating system (ie, Windows). Open up your computer and confirm the power cable is firmly connected to the hard drive and that the cable that connects the hard drive to the motherboard is firmly secure.
If both of these check out, then try downloading this bootable CD on another computer. This CD, among other things, has a few hard drive utilities that will help further diagnose the problem.
Finally, if the utilities on this CD are unable to see the hard drive itself, then is may need to be replaced. Try testing with another hard drive or another cable to connect it to the motherboard.