Low connectivity, cannot see other networks!

Hi all,

My Sony Laptop (I bought it used online - "Sony Vaio PCG-GRT270G") will not connect to the network, nor open web pages.

Anyhow, one day it suddenly said it was connected to this "fmc-guest" connection. Wouldn't show any other wireless networks (including my usual one). Couldn't open IE or Firefox. Said 'low connectivity.' (sometimes said 'strong,' but still wouldn't open web pages.)

Tried repairing, wouldn't work. Researched online, tried a BUNCH of things. Now, it claims it repairs itself.

Sometimes it won't renew the IP address, or clear the ARP cache, though usually does if I keep trying or restart and then try. Still won't open web pages.

Here are some 'warnings' and 'info' it gave in the "Event Viewer" that I copied. (I hope putting my IP address isn't a security risk!)

Then, after it claims it was repaired (but still couldn't see any other networks, nor open web pages) I get these messages:

Oh, yeah, I tried unplugging our main router for 2 minutes. It's a pain for me to unplug the computers, so I didn't. No change. Oh, also saw this message in the Event Viewer:


(regarding the SQL Browser

Not sure if any of this helps.

WHAT SHOULD I DO?

thank you people!