Looks like AVG has completely gone but no sign of MSE, you should not even think about going on-line without an Anti Virus.
Microsoft Security Essentials click on the link, install update and run it to be sure nothing has slipped in while you have had no protection.
There is no sign of any suspicious files.
The only bad thing in your system is Utorrent, use of P2P sites is asking for an infection.
SwitchBoard is an out of date and an unsupported program from Adobe and should be uninstalled. I can't see it in the programs list but may be worth a check as it appears to be running at startup and as a service.
I do wonder if the Dell on line back up utility could be causing a problem, is it scheduled to run a regular back up?
Everything else appears to be ok.
When your system is up and running are there any problems, no matter how small, that could indicate even a minor error in the system, anything running slower than usual, etc?
Report back on the System File Checker scan.
Here are a few things you can do then we will just have to see how it goes, any more BSOD's please post the minidumps.
You used Seagate for Windows to test the hard drive, you get a more accurate test by using the CD version as this can run a test when the hard drive is out of use, please correct me if I am wrong, I am simply going on the fact that you have the Seagate for Windows software installed.
Install and run this to clean out all your temporary files. Passwords saved for websites will need to be re-entered.
Temporary file cleaner Do not be tempted to use Registry Reviver. The following is advice to make you system more secure which at present it is not.
Download and install Winpatrol and use the Startup section to stop running non-essential software at boot up.
Go
Here, scroll down the page to the blue arrow where it says
"Download our FREE WinPatrol here" and click on it to download. Install the program. Launch the program and click on the
"Start up Programs" tab. Any programs you do not regularly use can be disabled.
Secunia PSI is a FREE security tool designed to detect vulnerable and out-dated programs and plug-ins which expose your PC to attacks. Attacks exploiting vulnerable programs and plug-ins are rarely blocked by traditional anti-virus and are therefore increasingly "popular"among criminals. Once installed, run a scan and it will warn you of any outdated programs.
Some additional security measures.
If your present security software does not include a third party Firewall or AntiSpyware.
Go
Here for a selection of third party Firewalls.
Go
Here or
Here for Anti Spyware.