It's really dreadful to start a day like this: You arrive at your office early in the morning, sit down and get down to the urgent work. Crap! The computer won't boot up at all. Reboot it, and still failure. Most of computer users might have experienced this. Stay calm!
For Computer Won't Boot with Hardware Issue:
If there's no signal light on your computer when you try to boot it, it might be PC power problem or hardware problems, you need to check it yourself or find some professionals to fix it.
Note: There is another reason for this issue: Graphic card failure. When Graphic card is failed, you computer can be running but it won't boot at all.
Fix Computer Won't Boot with A Windows bootable disk/CD
If the computer is running and you just can't boot it, you can fix this computer won't boot issue easily with a Windows bootable disk/cd. To solve this problem is quite easy. There are 5 things you can do to save your Windows back.
#1. Do a boot file recovery
When you start the computer, it always crashes with a black screen. There may be one of the following boot file lost. You can do a boot file recovery to get them back to normal.
* NTLDR is missing or corrupted
* Ntdetect.com is missing
* Ntoskrnl.exe is missing
* NTFS.SYS is missing
* BOOTMGR is missing or corrupted
* Hal.dll is missing
#2. Do a MBR recovery
MBR, the short name of Master Boot Recorder, locates the first sector of hard disk. The MBR is not placed in a partition, but located at a main boot record area in front of (with a lower LBA sector number than) the first partition. MBR issues can bring you the hard disk boot failure. When it happena, you will see "invalid partition table", "hard disk boot failure", etc. on your computer.
#3. Do a boot sector recovery
The partition boot sector is a small section of the hard disk partition that contains information about the operating system's file system (NTFS or FAT32), as well as a very small machine language program that is crucial in assisting the operating system as it loads. If you suspect that Windows XP won't boot because the partition boot sector has been corrupted, you can try to fix it.
#4. Do a registry recovery
Registry is a small database that stores configuration settings and options in Windows. It contains settings for low-level operating system component as well as the applications running on the platform: device drivers, kernel, services, user interface, SAM, and third party application all make use of the registry. If Registry is corrupted, it may cause Windows not booting up. You may encounter blue screen, blank screen, application booting error, registry configure error, etc. All these problems may be caused by Registry abnormity.
#5. Do a Windows restore
The problem of Windows booting failure can be caused by different reasons, like corrupted or missing Windows system file; corrupted DPT (Disk Partition Table); damaged MBR, and corrupted registry. If you backed up your Windows/MBR/DPT/Registry before, you can restore it easily by clicking the button below when they crashed.
No matter why your computer can't boot up, the first thing you should do is to get a Windows bootable disk or CD to get your computer starting. Only the computer is started, you can troubleshoot other errors or problems on the system. Get a bootable LiveBoot CD/USB, which contains the startup files that can be used to boot your Windows.
Keep this in mind when you encounter a "Windows won't start" problem. It can help you fix it rapidly and accurately. All solutions to Windows booting issues are contained in this bootable LiveBoot CD, as well as data recovery, disk manager and password finder.
Now, follow the steps below to boot your computer.
Inset it to your computer CD-ROM and restart your computer. Then choose to boot your computer from LiveBoot. And now you can check to repair Windows 7 boot, or do a Windows XP startup repair. Whatever, this bootable CD is compatible with all Windows.
And more, after loading your system, you can do all of the following work with this LiveBoot, which offers you a series of Windows repair utilities.