His parents are still in shock at being told the news.
Mum Helen said: 'A stroke is something your grandparents have not your two-year-old son. We just couldn't believe it when we were told that's what had happened.'
Archie now faces a tough year of treatment, physiotherapy and check-ups. And the family faces anxious times because Archie has a one in four chance of suffering another stroke in the next 12 months. No-one knows for certain what the future holds for him.
Archie's stroke is believed to have been triggered by a bout of chicken pox. According to the Stroke Association, one child in 25,000 suffers a stroke as a result of the virus because it shrinks the arteries.
The family's nightmare began last month when Archie woke up unable to walk and talk as well as he could the day before.
His mum, Helen, 33, assumed her youngest son had a trapped nerve affecting his right side and took him to St Mary's Hospital, Milton, to be checked out.
It was there she was told the terrifying diagnosis the two-year-old had suffered a stroke.
Helen, of Park House Farm Way, Leigh Park, said: 'It was awful seeing him lying there in a hospital bed surrounded by machines and not being able to do anything for him.
'We didn't know what to do. We'd never heard of a child having a stroke before. Now we have to wait and see what happens. We always have someone with him watching to see if he has any signs of another stroke.'
Archie is now recovering and can walk and talk, although not as well as he could.
Helen is now encouraging other parents to find out about chicken pox vaccinations for their children to protect them from the possibility of a stroke, but doctors say it is early days in the research.
Professor of paediatric neurology at Southampton General Hospital, Fernella Kirkham, said: 'Strokes in children aren't as rare as people think.
'Children generally recover better than adults with 40 per cent making a good recovery and 60 per cent having some problems.
'Parents with children who have chicken pox shouldn't worry as a stroke is a very rare complication of the illness and research into whether or not the chicken pox vaccine makes a difference is still needed.'
The vaccine is not part of routine childhood vaccinations because the Department of Health fears it could cause a rise in the number of adults developing shingles, a variation of the same virus.