unable to get antivirus or mount usb stick

[pingball57]

Thanks firenice03 but things are still not going straight here. I ran autoremove in a new CLI (nothing else open as far as i can tell) but it gives:

jpa@jpa-SATELLITE-C850D-11Q:~$ sudo apt autoremove
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

Doing sudo apt-get install clamav gets same result :

jpa@jpa-SATELLITE-C850D-11Q:~$ sudo apt-get install clamav
[sudo] password for jpa:
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
jpa@jpa-SATELLITE-C850D-11Q:~$

All this is one reason I'm looking for a virus as a possible cause. My password contains capitols might this have any effect (i don't think it should). I also found a virus scan report in my home/documents folder dated yesterday but there was nothing in it.
I've been having a lot of trouble with anything electrical at the moment esp. if it contains micro processors & I'm finding it all a bit freaky.
Thanks again for taking time with this. If there are delays in my replies it's because i get little chance to do things like this.

update (5 min later):
Talking of freaky, on shutting down just now I got a strange & worrying black screen with widely spaced text & before i could make any sense of it it cut to the closedown splash but with the message 'unattended upgrade in progress' a percentage & sleep in 5s - it then shut down but I'm sure i saw upgrade complete for an instant. I wasn't upgrading anything or running anything so i can only assume somethings been going on in the background. sneaky things like this worry me. It's one reason why i got rid of windows.

update:
thinking this 'upgrade' was the problem I reopened a CLI & ran autoremove which seems have worked & removed quite bit of stuff, so i ran apt-get install clamav, which also seems to have worked, so i ran freshclam which gave the expected error;

jpa@jpa-SATELLITE-C850D-11Q:~$ sudo freshclam
[sudo] password for jpa:
ERROR: /var/log/clamav/freshclam.log is locked by another process
ERROR: Problem with internal logger (UpdateLogFile = /var/log/clamav/freshclam.log).

but the suggestd rm -rf gives this :

jpa@jpa-SATELLITE-C850D-11Q:~$ rm -rf /var/log/clamav/freshclam.log
rm: cannot remove '/var/log/clamav/freshclam.log': Permission denied
jpa@jpa-SATELLITE-C850D-11Q:~$

So whats preventing me?