I searched everywhere but not able to fix my problem. Can someone please help me?Here are the details. I have Ubuntu 14.04 LTS as host OS. Gps driver for windows 10. I installed Oracle VirtualBox on it.

• Gnome Power Manager Not Installed Correctly Ubuntu 10.10 64
• Gnome Power Manager Not Installed Correctly Ubuntu 10.10 Download

Gnome Power Manager Not Installed Correctly Ubuntu 10.10 64

Gnome Power Manager Not Installed Correctly Ubuntu 10.10 Download

Then I installed CentOS 6.6 as guest OS inside VirtualBox.I was using it daily with no issues. Suddenly one day I saw a message that 'Configuration defaults for gnome power manager has not been installed correctly', then I get login screen and after login nothing is displayed inside the VM window.I used the gparted-live-0.22.0-2-i586.iso to go to its command prompt and there I used fdisk /dev/sda command to resize the partition.Even after that I am not able to resolve the GNOME error and not able to login to centos inside virtualbox.Can someone please help? Let me know if you need additional information.