Another poster had this problemviewtopic.php?f=8&t=6586
TBH if you want a PC which is fully supported by a responsible manufacturer, don't buy Advent.
The brand is a Dixons Stores Group name like Matsui and the hardware is sourced from various far eastern companies which do not offer any customer support.(neither do Dixons after the warranty has expired).
Parts are impossible to locate except for non functioning examples which occasionally appear on Ebay.