Update the AMD video driver from Dell's website, for your model.
Uninstall McAfee normally, reboot, then run the tool to remove it that they offer, as well.
atikmdag atikmdag.sys Mon Sep 10 22:26:41 2012 (504EA161)
atikmpag atikmpag.sys Mon Sep 10 21:26:47 2012 (504E9357)
Set Windows Firewall and Windows Defender services to Automatic and start them too.
Update Bluetooth driver from Intel.com or Dell.com:
Driver Reference Table - iBtFltCoex.sys
iBtFltCoex iBtFltCoex.sys Tue Jul 24 06:03:05 2012 (500E72D9)
Update Realtek lan driver:
Download File | Dell US
Rt630x64 Rt630x64.sys Tue Jun 12 09:37:53 2012 (4FD74631)
That should do it, so enjoy.