What to do when your Windows XP or Windows Vista system refuses to boot.
How do I prepare an emergency boot disc so I'm ready in case Windows becomes unbootable?
For Above queiries ;
You're in real luck if you have a full Windows XP CD or Vista DVD. These come with great tools for diagnosing and repairing an unbootable PC. In fact, if you don't have a real Windows disc, find one you can borrow in an emergency. Don't install Windows from a borrowed disc, but if it has the same version of Windows as your PC, use its repair tools.
Boot from an XP CD, and press
R at the 'Welcome to Setup' screen to see the Recovery Console, a DOS-like command-line environment with a number of useful utilities.
If you boot from a Vista DVD, click Repair your computer to open the System Recover program. There you'll find options to automatically fix boot problems, restore your hard drive from an image backup, diagnose memory, or perform a system restore.
If you're ready for a Windows alternative, try Puppy Linux, which you can download as a ready-to-burn .iso file from the Puppy Linux Web site. Boot from the CD, and you'll have a nongeek's version of Linux running on your PC. Puppy Linux is the best tool I've found for one extremely important job: copying important files off an unbootable hard drive. Unlike UBCD4Win, Puppy recognizes USB drives, making it extremely easy to put these files where you can readily access them.
The XP CD's Boot Tool Kit
Enter these commands in Windows XP's Recovery Console to perform CPR on your disks and files.
|Attrib||Changes the attributes of a file or directory.|
|Batch||Executes the commands specified in the text file.|
|Bootcfg||Boot file (boot.ini) configuration and recovery.|
|ChDir (Cd)||Displays the name of the current directory or changes the current directory.|
|Chkdsk||Checks a disk and displays a status report.|
|Cls||Clears the screen.|
|Copy||Copies a single file to another location.|
|Delete (Del)||Deletes one or more files.|
|Dir||Displays a list of files and subdirectories in a directory.|
|Disable||Disables a system service or a device driver.|
|Diskpart||Manages partitions on your hard drives.|
|Enable||Starts or enables a system service or a device driver.|
|Exit||Exits the Recovery Console and restarts your computer.|
|Expand||Extracts a file from a compressed file.|
|Extract||Extracts files from compressed .cab archives.|
|Fixboot||Writes a new partition boot sector onto the specified partition.|
|Fixmbr||Repairs the master boot record of the specified disk.|
|Format||Formats a disk.|
|Help||Displays a list of commands you can use in the Recovery Console.|
|Listsvc||Lists the services and drivers available on the computer.|
|Logon||Logs on to a Windows installation.|
|Map||Displays the drive letter mappings.|
|Mkdir (Md)||Creates a directory.|
|More||Displays a text file.|
|Net Use||Connects a network share to a drive letter.|
|Rename (Ren)||Renames a single file.|
|Rmdir (Rd)||Deletes a directory.|
|Set||Displays and sets environment variables.|
|Systemroot||Sets the current directory to the systemroot directory of the system you are currently logged on to.|
|Type||Displays a text file.|