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Hp paviliondv2050us wont start

\015 Windows could not start following files missing windows/system32 /config /system\015

Answers :

Just repair your windows using provided Windows disk...such files are corrupted due to virus problems.
\015\012
\015\012So repairing it will solve your problem and also you won't loose data.
To complete part one, follow these steps: \015\012
    \015\012
  1. Insert the Windows XP startup disk into the floppy disk drive, or insert the Windows XP CD-ROM into the CD-ROM drive, and then restart the computer.
    Click to select any options that are required to start the computer from the CD-ROM drive if you are prompted to do so. \015\012
  2. When the "Welcome to Setup" screen appears, press R to start the Recovery Console. \015\012
  3. If you have a dual-boot or multiple-boot computer, select the installation that you want to access from the Recovery Console. \015\012
  4. When you are prompted to do so, type the Administrator password. If the administrator password is blank, just press ENTER. \015\012
  5. At the Recovery Console command prompt, type the following lines, pressing ENTER after you type each line: \015\012md tmp
    copy c:\\windows\\system32\\config\\system c:\\windows\\tmp\\system.bak
    copy c:\\windows\\system32\\config\\software c:\\windows\\tmp\\software.bak
    copy c:\\windows\\system32\\config\\sam c:\\windows\\tmp\\sam.bak
    copy c:\\windows\\system32\\config\\security c:\\windows\\tmp\\security.bak
    copy c:\\windows\\system32\\config\\default c:\\windows\\tmp\\default.bak

    delete c:\\windows\\system32\\config\\system
    delete c:\\windows\\system32\\config\\software
    delete c:\\windows\\system32\\config\\sam
    delete c:\\windows\\system32\\config\\security
    delete c:\\windows\\system32\\config\\default

    copy c:\\windows\\repair\\system c:\\windows\\system32\\config\\system
    copy c:\\windows\\repair\\software c:\\windows\\system32\\config\\software
    copy c:\\windows\\repair\\sam c:\\windows\\system32\\config\\sam
    copy c:\\windows\\repair\\security c:\\windows\\system32\\config\\security
    copy c:\\windows\\repair\\default c:\\windows\\system32\\config\\default
    \015\012
  6. Type exit to quit Recovery Console. Your computer will restart.
Note This procedure assumes that Windows XP is installed to the C:\\Windows folder. Make sure to change it is a different location.

If you have access to another computer, to save time, you can copy the text in step five, and then create a text file called "Regcopy1.txt" (for example). To use this file, run the following command when you start in Recovery Console: \015\012batch regcopy1.txtWith the batch command in Recovery Console, you can process all the commands in a text file sequentially. When you use the batch command, you do not have to manually type as many commands. \015\012Part two\015\012\015\012 loadTOCNode(3, 'moreinformation');\015\012 \015\012To complete the procedure described in this section, you must be logged on as an administrator, or an administrative user (a user who has an account in the Administrators group). If you are using Windows XP Home Edition, you can log on as an administrative user. If you log on as an administrator, you must first start Windows XP Home Edition in Safe mode. To start the Windows XP Home Edition computer in Safe mode, follow these steps. \015\012
    \015\012
  1. Click Start, click Shut Down (or click Turn Off Computer), click Restart, and then click OK (or click Restart). \015\012
  2. Press the F8 key.

    On a computer that is configured to start to multiple operating systems, you can press F8 when you see the Startup menu. \015\012
  3. Use the arrow keys to select the appropriate Safe mode option, and then press ENTER. \015\012
  4. If you have a dual-boot or multiple-boot system, use the arrow keys to select the installation that you want to access, and then press ENTER.
In part two, you copy the registry files from their backed up location by using System Restore. This folder is not available in Recovery Console. Before you start this procedure, you must change several settings to make the folder visible: \015\012
    \015\012
  1. Start Windows Explorer. \015\012
  2. On the Tools menu, click Folder options. \015\012
  3. Click the View tab. \015\012
  4. Under Hidden files and folders, click to select Show hidden files and folders, and then click to clear the Hide protected operating system files (Recommended) check box. \015\012
  5. Click Yes when the dialog box that confirms that you want to display these files appears. \015\012
  6. Double-click the drive where you installed Windows XP to display a list of the folders. If is important to click the correct drive. \015\012
  7. Open the System Volume Information folder. This folder is unavailable and appears dimmed because it is set as a super-hidden folder.\015\012
  8. Open a folder that was not created at the current time. You may have to click Details on the View menu to see when these folders were created. There may be one or more folders starting with "RPx under this folder. These are restore points. \015\012
  9. Open one of these folders to locate a Snapshot subfolder. The following path is an example of a folder path to the Snapshot folder: \015\012C:\\System Volume Information\\_restore{D86480E3-73EF-47BC-A0EB-A81BE6EE3ED8}\\RP1\\Snapshot\015\012
  10. From the Snapshot folder, copy the following files to the C:\\Windows\\Tmp folder: \015\012
      \015\012
    • _REGISTRY_USER_.DEFAULT \015\012
    • _REGISTRY_MACHINE_SECURITY \015\012
    • _REGISTRY_MACHINE_SOFTWARE \015\012
    • _REGISTRY_MACHINE_SYSTEM \015\012
    • _REGISTRY_MACHINE_SAM
    \015\012
  11. Rename the files in the C:\\Windows\\Tmp folder as follows: \015\012
      \015\012
    • Rename _REGISTRY_USER_.DEFAULT to DEFAULT \015\012
    • Rename _REGISTRY_MACHINE_SECURITY to SECURITY \015\012
    • Rename _REGISTRY_MACHINE_SOFTWARE to SOFTWARE \015\012
    • Rename _REGISTRY_MACHINE_SYSTEM to SYSTEM \015\012
    • Rename _REGISTRY_MACHINE_SAM to SAM
These files are the backed up registry files from System Restore. .

\015\012Part Three\015\012\015\012 loadTOCNode(3, 'moreinformation');\015\012 \015\012In part three, you delete the existing registry files, and then copy the System Restore Registry files to the C:\\Windows\\System32\\Config folder: \015\012
    \015\012
  1. Start Recovery Console. \015\012
  2. At the command prompt, type the following lines, pressing ENTER after you type each line: \015\012del c:\\windows\\system32\\config\\sam

    del c:\\windows\\system32\\config\\security

    del c:\\windows\\system32\\config\\software

    del c:\\windows\\system32\\config\\default

    del c:\\windows\\system32\\config\\system

    copy c:\\windows\\tmp\\software c:\\windows\\system32\\config\\software

    copy c:\\windows\\tmp\\system c:\\windows\\system32\\config\\system

    copy c:\\windows\\tmp\\sam c:\\windows\\system32\\config\\sam

    copy c:\\windows\\tmp\\security c:\\windows\\system32\\config\\security

    copy c:\\windows\\tmp\\default c:\\windows\\system32\\config\\default
    Note Some of these command lines may be wrapped for readability. \015\012
  3. Type exit to quit Recovery Console. Your computer restarts.
\015\012Note This procedure assumes that Windows XP is installed to the C:\\Windows folder.
\015\012
\015\012If you have access to another computer, to save time, you can copy the text in step two, and then create a text file called "Regcopy2.txt" (for example). To use this file, run the following command when you start in Recovery Console:
\015\012batch regcopy2.txt\015\012Part Four\015\012Click Start, and click All Programs. \015\012Click Accessories, click System Tools. \015\012Click System Restore, click Restore to a previous RestorePoint.
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