It's regularly visited by Chech AVG-staff. They surely know.
However, are you sure you need version 5? The current version is 9.0. I installed it on my sister-in-law's PC (she had Windows XP also) a few weeks ago to replace the old 8.5.
It's Avast! antivirus that recently went to 5.0, not AVG.
I am a google chrome and Windows XP user and I've been trying to download and install the AVG upgrade before my licence expires but every time I tried, nothing seems to happen, i.e. no download. Could you please give me a direct link and tell me what options I need to turn on or off with my Google Chrome browser or Windows XP? Thanks very much for your help in advance. I really appreciate it.