• ls /media
• If you don’t see a folder for your Windows partition, you should create one with the following command:

  sudo mkdir /media/windows

• Next, mount the partition in read-only mode onto this folder with this command:

  mount -t ntfs-3g -o ro /dev/sda3 /media/windows

If you need to completely remove VirtualBox, e.g. because a new version install fails preventing future installations then from the Console run commands below:

List VirtualBox installations

sudo dpkg -l | grep virtualbox

Example below

sudo dpkg -l | grep virtualbox
rc virtualbox-4.3 4.3.30-101610~Ubuntu~raring amd64 Oracle VM VirtualBox
iW virtualbox-5.0 5.0.28-111378~Ubuntu~trusty amd64 Oracle VM VirtualBox

Purge these installations in sequence replacing 4.3 and 5.0 with your versions  and answering ‘Y” to questions

sudo  apt-get purge virtualbox-4.3 virtualbox-qt

sudo  apt-get purge virtualbox-5.0 virtualbox-qt

After reboot you should be able to reinstall VirtualBox without errors

Follow the steps below to disable mouse middle or wheel click button:

1. First from Terminal run “xinput list” to discover your mouse device name, e.g. in this example it is “Microsoft Microsoft Wheel Mouse Optical®“.

xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Belkin Corporation Flip KVM id=8 [slave pointer (2)]
⎜ ↳ Microsoft Microsoft Wheel Mouse Optical® id=10 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
 ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
 ↳ Power Button id=6 [slave keyboard (3)]
 ↳ Power Button id=7 [slave keyboard (3)]
 ↳ Belkin Corporation Flip KVM id=9 [slave keyboard (3)]
 ↳ LITE-ON Technology USB NetVista Full Width Keyboard. id=11 [slave keyboard (3)]

2. From the console run xinput get-button-map with the mouse device name above to output the mouse button map. The first three digits (1 2 3) of the button map of interest represent the left, middle, and right mouse buttons. A non-zero digit means the button is enabled. Setting digit 2 to zero  disables the mouse middle or wheel click button, e.g. the map would read 1 0 3 4 5 6 7 is it is disabled.

/usr/bin/xinput get-button-map "Microsoft Microsoft Wheel Mouse Optical®"
1 2 3 4 5 6 7

3. To disable the wheel click at login create a desktop file, e.g. “mousewheelpasteoff.desktop” with the contents below and save it to ~/.config/autostart folder. The xinput set-button-map command below disables the mouse middle or wheel click button

[Desktop Entry]
Name=Disable mouse wheel click at login
Exec=xinput set-button-map "Microsoft Microsoft Wheel Mouse Optical®" 1 0 3 4 5 6 7
Icon=utilities-terminal
Terminal=false
Type=Application
Categories=Utility;Application;

4. Alternatively in Terminal run the command directly to disable it only for the current session.

/usr/bin/xinput set-button-map "Microsoft Microsoft Wheel Mouse Optical®" 1 0 3 4 5 6 7

This cure is applicable to Linux based systems such as Kubuntu and Ubuntu.

Stop those annoying pop-ups intruding into your workspace by simply running Spotify Music player in a second desktop window and leave it maximised as follows:

1. Go to System Settings/Workspace Behaviour/Virtual desktops and increase the number of desktops to 2
2. Activate second desktop by typing Ctrl-F2
3. Launch Spotify and select the music you like to play
4. Switch back to main desktop by typing Ctrl-F1 or select desktop from System Tray icon and continue working!

This leaves Spotify nicely out of sight but still controllable from the System Tray icon.

This works for Ubuntu too. Here Desktops are better known as Workspaces. Use Ctrl+Alt+Right or Ctrl+Alt+Left-arrow or System Tray icon to switch workspace.

From Ubuntu 13.04 onwards extra Workspaces are disabled by default. To enable Workspaces  go to System Settings/Appearance/Behaviour and tick the “Enable Workspaces” .