Hi SafeSurf,
Thanks for your comprehensive reply.
Now I had hoped when I posted my first message that the problem might be resolved without having to explain the following but as not then here goes.
I had an earlier free version of AVAST ( 5.0.667.0) installed prior to AVAST 7 (7.0.1456 and which is also the free version ). I had selected the various automatic updates to the program and engine as they occurred without any problems and so I am not sure what the final versions were but 5.0.667.0 was the last version I installed from a downloaded set-up file prior to AVAST 7.
I had run earlier versions of AVAST too which I had always ran from a set up file and overriding any earlier versions without trouble.
I seemed to have a problem updating to AVAST 7 when it was announced on the AVAST interface I was then running. So I downloaded the set-up file and ran this without uninstalling the old version first. At this stage I was not aware a clean install may be necessary having done this sort of thing frequently with lots of different software and never running into trouble.
Anyway that said I installed AVAST 7 without problems and it was updating OK as with the old version.
Shortly after, I decided it was time to update my firewall too. I use Zone Alarm free firewall and the version I had prior to the AVAST problems was 10.1.101.0.
I decided to upgrade to free version 10.2.64.0 and this is when the problems started. I noticed that this version also included a free antivirus program which is the first time to my knowledge that Zone Alarm have done this. The antivirus had to be downloaded and installed as a separate part to the firewall set-up.
I knew that if I did that I would get a conflict so I avoided it like the plague but after running the two programs (ie Zone Alarm and AVAST 7) quite successfully for a while, I made the mistake of clicking the antivirus button on the Zone Alarm interface. I could not stop it from downloading so I did a forced reboot but it carried on downloading after the PC had rebooted anyway and once complete the problems started: AVAST 7 seemed frozen and would not update.
The Zone Alarm program said I needed to remove a conflicting program (ie AVAST 7) which I didn’t want to do being very happy with AVAST.
I tried running the AVAST 7 set-up again but it would not run to over write the first install. The set-up icon kept revolving.
I went back to the earlier version of Zone Alarm but the AVAST 7 problem remained.
I did some searching and found the uninstall facility and removed AVAST 7 in SAFE MODE and re-installed AVAST 7 from the setup file. Everything seemed perfect apart from the lack of updating.
Zone Alarm is working fine.
So that is where we are currently. I tried Pondus’s suggestion to repair AVAST 7 and rebooted but the problem remains. I am stuck on virus definitions version 120713-0.
I hope this explains it all.
Should I do as you say and repeat the process of a clean install?
Many thanks for your help.
Greg.
PS I did have a version of Norton in the distant past but I uninstalled that with the Vendors facility.