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Starting Virtualbox guest shows VERR_SSM_LOAD_CONFIG_MISMATCH

The host machine experienced a power failure, when a guest machine was started up it failed with error message below. Failed to open a session for the virtual machine MACHINENAME. ahci#0: The target VM is missing a device on port 0. Please make sure the source and target VMs have compatible storage configurations [ver=6 pass=final] (VERR_SSM_LOAD_CONFIG_MISMATCH). It seems like Virtualbox virtual machine configuration was corrupted. Looking at the virtual machine settings noticed that the virtual HD attached to the SATA port was gone. To workaround this case, re-attached the latest snapshot to the VM. Use Virtual Media Manager to determine the correct UUID.

Mounting Samba share in Windows 7 yields System error 58 has occured

Got a Windows 7 SP1 32-bit Pro machine that have seen various large applications already. So I am not sure if the security policy of the machine is the default. When trying to mount a Samba share got the error message below. System error 58 has occurred. The specified server cannot perform the requested operation. This was done via net use \\<ip>\share . Mounting the share via Windows Explorer yields nothing, just a long wait for nothing. The fix for my case was to change Security Settings | Local Policies | Security Options | Microsoft network client: Digitally sign communications (always) to disabled . You have to reboot the machine for the changes to take effect. References: http://social.technet.microsoft.com/Forums/windows/en-US/5dd9991b-78e7-4fa3-b17c-366e4ae0092f/cant-connect-to-samba-from-windows-7-vista-xp-ok-many-popular-solutions-tried-without-success?forum=w7itpronetworking

Windows 8.1 Pro RTM auto-resize guest display not working in VirtualBox 4.2.18

Microsoft changed course and released Windows 8.1 to MSDN and TechNet users earlier than planned. It was made available last Sept 8, 2013 . This got me excited to play with this latest version. Downloading the ISO was quite frustrating as I can't use Firefox Download Them All plugin, just does not work. Downloading via IE10 was also painful but there is a workaround. VirtualBox also released 4.2.18 last Sept 6, 2013. This must be good, two good products released in the past few days. Upgrading of VirtualBox didn't work the first time. I have to do a repair to get it to work. So essentially, I have to install it twice. Installing of Windows 8.1 into VirtualBox was nonevent. But getting guest additions was challenging. I had to read lots of blogs including VirtualBox 4.2.18 release forum discussion topic . So, how did I get guest addition auto-resize to work? I have to install guest additions *twice*! This is what was working for me: Install guest additions... then re

XFCE: Install a lighter weight version of XFCE in Ubuntu 13.04

Default XFCE 4 install in Ubuntu comes with a lot of applications that I don't need. So I always install from alternate method using mini.iso to have a bare bones system and yet usable. I have been using LXDE for a while but I think it is time to experiment with XFCE. From a minimal install of Ubuntu, adding XFCE with minimal applications is a breeze, like: $: sudo apt-get install --no-install-recommends xubuntu-desktop

XFCE: Remove Mail Reader entry in menu

How to remove Mail Reader entry in XFCE menu. As a matter of good practice, backup the original configuration. Create a backup folder in your home directory like ~/backup . Copy  /usr/share/applications/exo-mail-reader.desktop to ~/backup . We will be making global (machine level) change so all users will not see Mail Reader entry. Edit exo-mail-reader.desktop using your favorite editor, comment out the line like #OnlyShowIn=XFCE; then add the following line  NotShowIn=XFCE; .