I have a Dell PowerConnect 2824 24-port 10/100/1000 Gigabit Switch Switch for my household.  At seemingly random times, the network freezes and I get no internet access.  If I bypass the switch, I can get wireless internet from the cable modem.  It comes back after a while but also returns after I reset the switch. 

Any suggestions?  Time to buy a new switch?  Which one?

I am running software version 1.0.0.45 and boot version 1.0.0.13 and Hardware version 00.00.02

Thanks.