E: _cache->open() failed, please report.

To be sure your system is fully upgraded and updated...
Open a Terminal from the menu Applications->Accessories->Terminal and type:

sudo dpkg --configure -a
sudo apt-get -f install
sudo apt-get clean all
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo apt-get clean all
sudo apt-get autoremove

then please reboot your system, type

sudo reboot

give your user password when requested, you don't see nothing when you type it, then press enter.

Hope this helps

Thanks, however I can't get past the second command. When I do
sudo apt-get -f install
the following is the output:

xxx77@xxx77-laptop:~$ sudo apt-get -f install
Reading package lists... Error!
E: Read error - read (5 Input/output error)
E: The package lists or status file could not be parsed or opened.

Any other suggestions?

Hi Jonathan,
which command did you run in the first place when this E: occured?
Did you want to install updates? From Terminal, with Synaptic or update manager?

Please make sure that not two programs run an update at the same time.

If in doubt check this file as "root" and rename it.
/var/lib/apt/lists/lock

Please also be sure your hard-disk have not error...

Open a Terminal from the menu Applications->Accessories->Terminal and type:

sudo touch /forcefsck

give your user password when requested, you don't see nothing when you type it, then press enter.

Then at next reboot of your pc the hard disk will be checked.

So please reboot your pc to perform the hard-disk check.

Hope this help

thanks man . . . . . . .

the hard dick check and reboot thing is working fine . . . . . .

Any update on this issue?
How can we solved it?