When you run Acronis version 10 on a Windows 2008 R2 you get the error “0xc0000225 – Boot selection failed because a required device is inaccessible.
To fix this problem:
- Boot Windows 2008 R2 CD
- Select repair
- Run command line
- Now run these commands
Bootrec /fixmbr
Bootrec /fixboot
Bootrec /rebuildbcd
Reboot the server and your windows is running again.
Source: http://www.qliktips.com/2012/11/fix-windows-8-boot-issue.html