Avast (Free, Pro, Premier) Lock up PC

[Jon Doe]

Hello. I am looking for a new, reliable, antivirus product and was recommended Avast. However, I find that I cannot use it as, after installation, several of my existing programs no longer work. Also, Avast informs me that my PC is not protected but I cannot enable any of Avast's modules. My Internet connection is also knackered.

I have tried all the trial versions of your product and all fail to work.

My PC is running Windows 7 SP-1 64bit, , 6GB DDR3 RAM

[Pondus]

did you uninstall your previous used AV before installing avast?

General: Uninstalling a third-party antivirus software.  http://www.avast.com/faq.php?article=AVKB11

[Jon Doe]

Yes. I use a program called Acronis TrueImage. I use this to create regularly hard disk images. Before I installed Avast, I restored a disk image that I had taken before I had installed ANY antivirus product. I was aware of possible conflicts so I thought this was the best option.

[Jon Doe]

I have just tried to install it again. Clean install, no other AV installed. The program appears to install correctly. The installation complete box appears telling me that a Quick Scan will take place. I have the Avast icons on my desktop.
However, nothing happens. In fact, it kills my Internet connection too so I have to revert to my iPad to get online help!

To be honest, I have spent long enough messing about with this. Unless someone can offer a working solution, Avast have lost a willing customer.

[Pondus]

attach (not copy and paste) OTL diagnostic log  http://forum.avast.com/index.php?topic=53253.0

when done a log expert will have a look....

[Jon Doe]

Do you want me to do this with or without Avast installed?

[Pondus]

it does not matter....

[Jon Doe]

OK. I have done as you requested. OTL was run without Avast installed.

Thanks for you help.

Edit: I have deleted the attachments as problem has been resolve. Thanks for your help.

[Pondus]

log expert is notified...

[essexboy]

I can see no apparent conflicts, something that I have seen work before is to install Avast in safe mode when all other drivers are inert, could you try that

[Jon Doe]

Thanks. I will give that a try.

I appreciate your time.

[Jon Doe]

WOW!

That worked!

Just entered Safe Mode (F8 at system boot), installed Avast. I have to say that after installation in Safe Mode, Avast didn't start a quick scan, in fact, I was thinking it was locked up again. However, on rebooting back into normal mode. Avast was there, working and so was everything else.

I do hope that I don't have issues with future upgrades etc.

Thanks for you time and patience. I would never of thought of installing a program in Safe Mode.

[essexboy]

In safe mode only windows drivers are running so that any that would conflict with the installation are not active

[Jon Doe]

First impressions are very good.

As I am trialling Premier, is it OK to disable the Windows Firewall? The Avast installation does not seem to have automatically disabled it and I was under the impression that it was a bad idea to have two firewalls running at the same time.

I realise that this is probably not the best place to ask, but I thought I would try!

Thanks.

[Alikhan]

First impressions are very good.

As I am trialling Premier, is it OK to disable the Windows Firewall? The Avast installation does not seem to have automatically disabled it and I was under the impression that it was a bad idea to have two firewalls running at the same time.

I realise that this is probably not the best place to ask, but I thought I would try!

Thanks.

They both work fine simultaneously.