I hate to bump this post as the last post was in 2010 but as of January 25th 2012 I wanted to confirm that this post, linked off of google for me, actually solved my problem that I was about to spend money on to have it fixed. I made an account on these forums just to post this.
Processor: AMD Phenom(tm) II X6 1100T Processor (6 CPUs), ~3.3GHz
Memory: 8192MB RAM
Hard Drive: 1 TB
Video Card: AMD Radeon HD 6800 Series
Operation System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.110622-1506)
Motherboard: ASUS Crosshair IV Formula AM3 AMD 890FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
Computer Case: Thermaltake Armor A90
I ferry my computer back and forth to my friends house because we have weekend long gaming binges from time to time during break or when our class schedules allow for us to do so. Recently my headset has gone bad because of static damage, and I thought that while I was ferrying my computer this time I had done some similar damage to the hard drive or something. I also considered that I, or my friend(s), may have gotten a virus somehow. The symptoms I was having was EXTREMELY slow loading on everything (particularly Firefox for w/e reason). I ran multiple virus / malware scans hoping that I could just clean my system of whatever was ailing it. I also tried disc cleaning, defragmenting, and cleaning the registry. This extreme slowness came almost out of nowhere, although it wasn't bad on the first day I noticed it.
The next day when I turned my computer on my desktop would continuously have the load icon, as well as my start bar. I thought maybe there was a serious virus that my Trend Micro and Malwarebytes wasn't picking up, or that I had something corrupted. I eventually got to the point where I couldn't even load up windows, it would just sit at the sign in screen and I couldn't even power down by holding down the button, I had to flip the power switch to get it to shut off. At this point I was distressed and attempted to load Safe Mode with Networking on my second attempt (the first time it froze which I figured was the end of my computer). When it loaded up, everything was as fast as when I first got windows 7 loaded on my computer (After shipping back my brand new out of the box BROKEN graphics card to Ibuypower and instead of receiving a new one, got the EXACT same one "fixed'). But I digress.
When I was finally able to load firefox I googled my problem and I found a forum post where someone had posted some log and a tech savvy guy caught an error with the driver
called "Security Processor Loader". I had no idea what this was and hadn't looked into it and when I did it took me about 30 minutes to find it because the option "Show hidden blah blah blah" has to be checked to view these. When I found that mine in fact had the same yellow exclamation I googled Security Processor Loader and was brought here.
Geeve's directions to reinstall my graphics driver seemed far fetched to me for whatever reason (Mostly because my graphics software had updated maybe 2 weeks earlier and it had been fine until this SUDDEN occurrence). However what I ended up doing was Uninstalling Security Processor Loader, because there is no option to update it. Then I went to AMD's website and downloaded the newest software patch.
I didn't even have to restart my computer, the second it finished installing it was like my freaking computer was cured of leprosy by Jesus or something.
MY POINT IN RESURRECTING THIS POST: As I googled around looking for a solution to my problem I saw other forum posts where the people asking the questions weren't getting the answers they were looking for. The general response by staff on the sites were telling them to Reinstall windows of all things. Obviously this situation didn't require as serious a response as that because Geeve's solution worked perfectly. If your computer has become SEVERELY slow out of the blue and freezes, attempt loading in Safe Mode. If Safe mode is fast for you, check your drivers while in safe mode. Control Panel > Device Manager > View > Show Hidden Devices > Non-Plug and Play Drivers > Security Processor Loader Driver. If there is a small yellow icon with an exclamation point. Uninstall it (I don't know if this is necessary because the graphics software should override it anyways), and then go to your graphics card / onboard graphics website and download the LATEST patch. I'm not entirely sure if you are able to run the installer(s) in safe mode so you may have to sit through firefox (or whatever browser you use) loading seemingly endlessly. OR you could put it on a disc/flashdrive and load it up that way.
Thank you Geeves, and cheers to anyone else that finds this post and benefits from it.