when i open my acer desktop computer,it dosent start up normal i get this message ( we apologize for the inconvenience ,but windows did not start successfully. a recent hardware or software change might have caused this. If your computer stopped responding, restarted unexpectedly, or was automatically shut down to protect your files and folders, choose Last Known Good Configuration to revert to the most recent settings that worked. If a previous startup attempt was interrupted due to a power of failure or because the Power or Reset button was pressed, or if you aren’t sure what caused the problem, choose Start Windows Normally. Safe Mode Safe Mode with Networking Safe Mode with Command Prompt Last Known Good Configuration (your most recent settings that worked) Start Windows Normally I've tried all of these options , but each one will bring me back to the same screen with the above text. I've also tried to reboot and press F8 to go to safe mode. same thing i have really important data in my computer , i just cant seem to find the right solution to my problem i hope someone knows how to fix this 1 person needs an answerI do too

Hello hisk520 You will need an XP installation CD to fix this. If you do not have one, try to borrow one just to run this fix. Configure your PC to boot from CD if it isn't already set up that way. You may need to enter the BIOS to configure the PC to boot from the CD. Set the boot order to Floppy (if present) CDROM Hard Disk SAVE and EXIT Start your PC with the XP Setup CD in the drive. When you see the "Press any key to boot from CD..." prompt, do so and let the CD-based boot process begin. When the Recovery Console option is offered ("Press R to start the Recovery Console"), do so. You may be asked which Windows installation to enter, in which case type the number of the Windows installation you wish to work on (usually "1"). When prompted, enter the Administrator's password for that Windows installation. If you did not set a password just press ENTER At the command prompt, type Bootcfg /Rebuild ENTER The exact wording will depend on your setup, but after a few moments you'll see a prompt that says something like: Total Identified Windows Installs: 1[1] C:\WindowsAdd Installation To Boot List? Assuming the information you see is correct, enter Y Bootcfg will start the process of rebuilding the boot list to include the indicated Windows installation After a moment, you'll be asked to "Enter Load Identifier." This is the name of the operating system that will appear in boot menus. Type Microsoft Windows XP Professional or Microsoft Windows XP Home Edition (whichever your system is) ENTER Next you'll be asked to "Enter OS Load Options." For normal installations, enter /Fastdetect ENTER Type Exit to leave the Recovery Console and reboot the PC If you cannot do this, all you can do is slave your hard drive in another machine to rescue all your data and files..