I have a new Acer laptop with a Broadcom network adapter and can connect to a 802.11b wireless router but I couldn't connect to the router at the village library which I think has 802.11g. How do I know for sure how to set my Broadcom network adapter so it can connect to an 802.11g signal. What settings should I look for. I checked my computer's device manager but couldn't get a model number for the Broadcom adapter. I have windows vista home premium 32bit on my Acer Extensa 5420-5038.

Getting the right and exact model number for the Broadcom is really key.

Try Everest Home Edition to get the specs.
Download from here and run it
- Click Reports->Report Wizard
- Get a Summary report in plain text
- You can attach the report or just copy / paste the info on your network adapter right into your post as that alone won't be alot of text

btw... most adapters are set for b&g (tho of course won't know for sure till the model number) tho have you check with the library if there are any other connection criteria?