The problems to my PC was i can't boot up cause the message show " Error.... loading operating system.

Your hard drive is missing from the system. Or, just does not recognize it. The obvious - Remove any USB devices like drives and any media from disc player. Its trying to load, but can't find bootable hard drive, CD, or USB... Remove the hard drive and reseat (reconnect). Check BIOS by pressing an F key during boot. Look on the screen for correct Function key. Might be F2 key. Verify BIOS recognizes the drive. It must be listed! There is no going forward if it's not. Check boot order and make internal hard drive first. Save and restart.

only way to bypass this is use a recovery disk to boot from and then perhaps the issue will manifest itself

otherwise, it's the dreaded re format step

Visit this link to fix this problem:

http://support.microsoft.com/kb/314058

Also use a system utility software like reginout to optimize your PC and avoid such type of problems in future.

Hope it works for you.

Few computer problems are more frustrating than a laptop that refuses to boot, as troubleshooting becomes infinitely more difficult when you are unable to get into the operating system. By understanding the common causes of laptop booting problems, you may be able to spare yourself the cost of paying an electronics store by resolving the issue on your own.
Laptop computer
Error Messages
If a laptop is unable to boot, there will usually be an error message giving you some idea of the problem's cause. Read this error message to know where to begin in the troubleshooting process. Some common error messages seen on laptop computers during the booting process include "NTLDR" messages, which deal with the operating system, and messages relating to the hard drive and the power supply.

Identifying a Software Issue
If a laptop has trouble booting and displays error messages generated by Windows, the cause is often a failed driver installation or other change that rendered the computer unstable. This type of issue can often be resolved by starting Windows in safe mode, then using the System Restore utility to roll the computer back to the previous configuration. If an external peripheral was recently added to your laptop, such as an external DVD drive, try booting the laptop with the device disconnected, then reconnecting it once Windows is fully loaded.

Identifying a Hardware Issue
Random booting issues on a laptop--those that seem to come and go with no explanation--are often caused by a problem with the hardware. Other symptoms of a possible hardware issue include a system that does not get past the POST screen (the initial monochrome screen displayed when the unit is turned on), or an error message containing the word SMART (this refers to an internal health monitoring system used by hard drives).

Identifying a Heat Issue
For all electronics, heat can be a killer. Heat-related issues can be caused by using the laptop in an unsafe way (such as by putting the laptop on a surface that blocks the air intake port), or by dust building up inside the cooling system. An unacceptable level of noise emanating from the cooling can generally signify that the cooling system needs to be cleaned in order to prevent a more serious issue. If a laptop has a booting problem that only tends to arise after the machine has been in use for extended periods, heat is likely to be the cause.

Prevention/Solution
Do not neglect your laptop's power supply. Laptop power supplies are often quite fragile, and are susceptible to damage from heat (exacerbated by being trapped under a desk or chair) as well as damage to the shielding surrounding the cable. Problems caused by a faulty power supply are often not instantaneous; it can take time for a power-related issue to become evident. To avoid booting problems that may be caused by a power issue, replace your laptop's power supply at the first sign of physical damage.

I hope you find it very helpful. Thank you.

The problem seems to be in your cds. In this case, especially if the product is still in warranty, you can ask from Sony website if they will send you a new set of cds.

try to boot into safe mode with a lower resolution screen

the hardrive has failed take it out and have it checked or replace

when you boot the laptop, if you don't see a message that says press any key to boot from CD, your boot order is wrong.

Check your boot order, when you see the splash screen (logo) look for a message that says press a F1-F12 key to change boot order or if that message is not displayed, press the key to enter setup.

Look for an option that list boot order and shows your hard drive, CD/DVD and USB options.

Move the CD/DVD item to the top of the list and try again.

Hi,

I would like to know your PC Operating system.
Have you recently updated yahoo on your pc or any other updates related to PC and operating system ?

Do let me know please.

Regards,
FixYa Yeam