I just got a new (used) laptop. It's a Twinhead A5020. It has 2 USB ports and 1 ethernet port. They seem to be inactive. Examples: my optical mouse does not light up when plugged into either USB port, and my router does not see (that is, the number for the port does not light) the connection. I have examined the CMOS options; only serial and printer ports are listed. The Device Manager in Windows does not see a network adapter or USB hub. Is it possible that there are dipswitches or jumpers that need to be set? Computer info: WinXP Pro Celeron 566 128 SDRAM AMIBIOS v.? Thanks for all suggestions.