Remote Access without installation?

[InsomniaCalls]

My uncle is hasseling me to reinstall his AV software and as I can't be bothered to treck to his house I said I'd do it remotely.
Normally I use LogMeIn for my remote access but as I've not been to his house
the software isn't installed on his PC and he's not got the know-how to do pretty much anything.

For work we use go to assist which allows a user to visit a URL and enter a code which downloads the necessary software and connects me up.

Is there any free equivilent you can think of?

Cheers

Si

 

[InsomniaCalls]

Is it enabled and allowed through the xp firewall by default?

He has Norton on at the moment and the subscription is about to run out (he's now panicking so I need to install something else for him).

Would the NIS firewall block remote assistance by default?
I have no idea how to navigate NIS as I long ago stopped using it
so the thought of advising someone who has no pc know-how over the phone is daunting.

 

[InsomniaCalls]

Meh. I was going to install Comodo.
All I need to do is set the installation away and let it go then I can disconnect.
I've not had any antivirus software in years and I've not had owt.
I doubt he'll be knackered in the ten minutes it'll take to install!