Linksys Wireless Router :: WRT54G2 V1 Is Losing Connection?

I bought a Linksys router last summer for my PC and Xbox. The PC and XBox are hardwired into the router. About two weeks ago, my router began dropping connection throughout the day. Sometimes it happens 3+ times in an hour. Other times it works for several hours before it drops.I upgraded the firmware as one fix and did a hard reset of the router. Still drops connection.I changed the MTU to 1400 and it worked fine for several hours but then dropped again the next morning. Also, like others on the forums, when I changed the MTU and hit Save Changes, it just ran and ran, never timed out...but never showed that it finished the command to save (if you get my meaning).I downloaded the Cisco Wireless Magic program to troubleshoot. It tells the same thing everytime. Unplug your router for 10 seconds and start over...My PC sometimes flashes a warning when I am restarting the router that I am getting Limited or NO Connectivity.