Please supply the following info,
exact make and models of the equipment please.
Make
and model of the broadband modem.
Make
and model of the router.
Connection type, wired or wireless.
If wireless, encryption used, (none, WEP, WPA, or WPA2)
Make/model of your computer.
Version and patch level of Windows on all affected machines, i.e. XP-Home (or XP-Pro), SP2, Vista, etc.
Register at
DSLReports and run their line quality tests. Post a link to the results here.