Performing the Windows operating system upgrade is relatively easy considering the helpful interface that easily guides you to perform the upgrade without much troubles. However, at times some issues may surface that bar you from doing it. These issues could be having incompatible hardware configurations, missing critical system files or boot files, etc.
When you face such problems, you should try to fix these issues to start with the new version of Windows operating system. If you are unable to do so, then you should perform Windows data recovery using a third-party Windows data recovery software.
Consider a situation in which you have a Windows 2000 system, which you are trying to upgrade to Windows XP. However, when you restart your system you get the following error message at startup and the system becomes inaccessible:
"Setup was unable to gain access to your existing boot configuration file, filename. You cannot upgrade Windows or restart your computer in the future without this file.
Please restart your computer and select the Recovery Console option. Then select the option to repair/recover your boot and configuration files. After restoring these files, you can restart Setup to upgrade Windows."
The root cause of this error message is that the boot.ini file has corrupted or damaged. Due to this, you are unable to carry out the Windows XP upgrade.
To resolve this problem, you should perform the following steps:
Modify the booting preferences in the BIOS section to boot from the Setup CD.
Insert the Setup CD in the CD-ROM drive and start the system.
Enter the Recovery Console.
In the command prompt, use the 'bootcfg' command with the following parameter to scan the hard disks for Windows installations and add them in the booting lists:
Type 'exit' to quit Recovery Console and restart the system.
If you still unable to get the system started, then you would need to reformat the hard drives and then install the operating system that you want to.
The best Windows data recovery software that is recommended by most data recovery experts is Stellar Phoenix Windows Data Recovery. Recovering more than 185 different file types from hard disks, iPods, memory cards, etc, this data recovery utility is compatible with Windows 7, Vista, Server 2003, XP, and 2000.