I spent several hours before finding solution to this problem. All actions were performed under VMware. I loaded to CD VMware image of Windows 7 Ultimate (Windows 2008 Server will do the job as well) and set boot from it. After launch and selecting language I selected recovery mode. Then I selected command line launch and typed the following commands:
> bootsect /nt52 ALL /force /mbr
> bootsect /nt60 ALL /force /mbr
Having done that, restart and get a working system.
Moving from VMWare to VirtualBox was done more safely using VMware import/export wizard.