A couple quick suggestions...
1. Minimize interference when you are trying to use your computer... turn off wifi to cell phone, xbox/ps?, wifi-tv, tablet, etc, etc, etc, ...
2. If you are still experiencing problems go to network setting and delete the known wi-fi association to your router. Then reconnect like you did the
very first time. Wired directly into the router with the disc and all.
If you are still having issues then there are a couple more things that can be tested but they can get slightly technical.
Now as for the over heating...
1. Get a can of pressurized air, pull the battery and power cord, and blow as much dust out as possible. Maybe even(assuming your warranty is up)
cracking open the innards, instead of just hitting the vents but make sure to discharge any static electricity before doing so.
2. Shutdown programs that start running at start-up if you don't have an on-hand immediate need for them. Windows OS's have a lot of unnecessary
programs from the get-go and they can easily be turned off to save processing space.
3. Download an internal temperature monitoring program. Someone earlier suggested Speedfan. Core Temp is another good one w/ low operating cost. Plus
you can usually find it w/o the bloatware and it has a simple overheat protection setting among a few others things.
Also find out what type RAM you have (DDR2, DDR3) and how much, and what operating system you have. You may just be running too much stuff and need
more memory(*Cheaper than buying a new Latop*). Most of the Dell Studios are expandable to my knowledge, so you can probably just double your RAM
provided the power source allows for it.
The Studio you have probably came with Vista, but it may be newer with Windows 7. Either way unless you specifically asked for more RAM before you
purchased it; Dell probably just shipped it to you or sold it to the retailer you bought it from, with the minimal required RAM. So if you don't
already have it, I would suggest running a minimum 4-6GB for Vista and 8GB for Windows7.
PS- If your router was just upgraded, you probably have a newer NetGear N-router that runs dual-band 2.4ghz and 5ghz. Because you probably have an
older NIC card you may be having trouble connecting to the 2.4ghz with identical settings for the 5ghz. So you might think about changing the SSID
name and password for the 5ghz broadcast or turning it off all together. If you can't do that, then put all the newer capable devices on the 5ghz
bandwidth to decrease interference but still change the SSID and password from the 2.4ghz so your laptop won't try to associate with it.
I hope some of that can be helpful...