First of all, this PROBLEM started a few months ago. Was playing a video game when computer blue screened, it booted back up fine and that was the one and only blue screen I have ever had on this machine. However since then I have had intermittent problems.

Some of the symptoms are as follows:

Explorer.exe freezes/hangs sometimes for only a few minutes, sometimes indefinitely, sometimes it completely crashes and fails to restart. When this happens, I can still move my cursor and hear sounds(for example if it happened while playing a game or watching youtube) but the video completely STOPS, internet connection is lost, cant click or do anything etc etc.

Sometimes after this happens mobo will fail to recognize my SSD and I get a bootmgr missing error. If I reset and go into BIOS my HDD isn't even an option, I have to do a full power cycle then reset BIOS to default for it to recognize my SSD again.

Case fan will fail to properly engage when computer is turned on, it will spin at about 15 RPM and there will be a loud grinding noise. Will take video when it happens again, usually rebooting computer 3~5 times solves this.

Windows update no longer seems to be working, keeps failing to install the same update for a week now.

Disk check and memory check said everything appeared fine. I ran the repair tool on windows CD but nothing came up there either. Neither my malware or AV have shown anything either.

This may or may not be a hardware issue, I have been trying to narrow it down with no luck. Seems like possibly either a MOBO or SSD issue? Hoping it is hardware since I have a solid warranty on every part.

Computer is a custom build with the follow specs:
Windows 7 64-bit (SP1)
MOBO - Asus P8Z68-V PRO
CPU - i7 2600k
Video - Asus EAH6970 DCII 2GB
RAM - GSKILL ripjawsX 4x4GB
PSU - CM silent pro M 850W
CASE - CM HAF X tower
Primary HDD - OCZ vertex 3 MAX IOPS
2ndary HDD - WD 1TB sata 3 caviar black
Running Malwarebytes anti-malware and McAfee security center(provided free through ISP) Quote from: Ryands60 on November 24, 2012, 05:21:40 PM

...Running Malwarebytes anti-malware and McAfee security center(provided free through ISP)

Some of your problems are likely caused by McAfee, the ISP provided ones seems to be the worst offenders.  Uninstalling it & removing all the leftovers can be challenging.  I recently fixed a massive slowdown problem on a Win7-64 quad-core laptop & many of the issues were resolved by the removal of the ISP provided Norton suite.

Replace McAfee with MSE (Microsoft Security Essentials), also free with valid Windows license.

http://service.mcafee.com/FAQDocument.aspx?id=TS101331

Some of your problems do seem to be hardware related, you can also test the RAM with MemTest & the hard drive with WD Data Lifeguard.  Don't know how to test the OCZ.

I uninstalled McAfee following all the steps you linked, appeared to be successful. On following restarts after its removal explorer.exe continued to crash several times. Took several restarts but managed to get a stable launch and installed security essentials, it rang through clean. Also ran MemTest86+, it also rang through clean with no problems. Will run check the WD drive tomorrow, I'm going to bed but will leave MemTest running over night and let it take a few more passes.

Dirty power will cause all kinds of random events...how old is this PSU ? ?

OK...however age isn't always an indicator...
If you can borrow a known good PSU of the same wattage and swap it in there for a day to test.

About 5 minutes ago had my 2nd blue screen ever, tried to take a picture but computer had rebooted by time I grabbed my camera.
On reboot i got bootmgr missing, had to do full power cycle then restore bios to defaults for my SSD to show up as an option.
Booted into safemode with CMD, ran a system file check, which returned some corrupt files but was unable to repair - it created a CBS log
rebooted into regular mode - cannot access the log that was created, says access denied and shows a blank notepad. - figured this part out

Blue screen crash report had the following to say -
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 4105

Additional information about the problem:
BCCode: f4
BCP1: 0000000000000003
BCP2: FFFFFA80113C8B30
BCP3: FFFFFA80113C8E10
BCP4: FFFFF800043DE460
Os Version: 6_1_7601
Service pack: 1_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\112512-19032-01.dmp  (Installed BlueScreenView to read the file, it is saying caused by Driver: "ntoskrnl.exe")
C:\WIndows\Temp\WER-19125-0.sysdata.xml  (Can't find this file at all)

As far as the PSU goes, I will venture to my computer shop and see if they have something I can borrow.

...
Files that help describe the problem:
C:\Windows\Minidump\112512-19032-01.dmp  (Installed BlueScreenView to read the file, it is saying caused by Driver: "ntoskrnl.exe")
C:\WIndows\Temp\WER-19125-0.sysdata.xml  (Can't find this file at all)

Looking like motherboard problem, but you can try reinstalling the chipset drivers.
If no good, next step would be Win7-64 repair install.
http://www.sevenforums.com/tutorials/3413-repair-install.html

If your anything like me, its driving you nuts not knowing the cause of a problem...