if you migrate a Windows Installation to another Computer or virtual environment such as VMWare ESXi or VMWare Workstation it could happen that the system won’t start.
A typical error when the master boot record or the boot sector of the boot partition needs to be updated or must be rewritten is when
- After Postscreen of the BIOS the console shows “Operating system not found” this means there is no boot code in MBR
- or it shows only a blinking cursor in the upper left edge. 2 possible reasons are thinkable
- MBR boot code is loaded but could not load the operation system => The boot sector of the Windows Boot partition needs to be updated
- The boot(active) flag of Windows boot partition is missing
For all cases you can use the command line program “testdisk” which is part of the most linux live CDs/DVDs to correct this.
Continue reading Windows: Windows did not start. Howto write a new MBR and recover Windows OS Bootsector