3 days ago, the main computer connection to the internet slowed to practically non-existent (30 minutes to download 2 6kb e-mails). Both laptops retain high speed internet and PS3's can game online.(Telstraclear is our provider).
We have done the following things, and still the problem persists;
Did a full diagnostic check with Telstraclear on bandwidth and speed
Cleaned the disk
sent it to technicians where it behaved perfectly on their system and they cleaned a couple of viruses out
changed network cables
We're at a loss to work out what the problem is.