On Friday early morning last week, I was having a serious problem with my computer. When I got off CSGO, there was a huge update and so I decided to run it. Then it happened. The thing was being absolutely slow and at times, would be unresponsive to any commands I've given to the computer. Even right clicking gave me the little blue circling what-you-mah-call-it. So after my chat with a friend, I closed my computer to get on it the next day.

The next day, things really went down hill. I went to check on my FB and the computer suddenly froze due to unresponsiveness. Waited...waited, lost my patience and shut my computer off via power button. So I tried again and went on steam, slower than usual. Tried to update CSGO and after I let it go, it restarted on its own after a few minutes. When it was booting up, it all went black then gave me the following message "BOOT MGR missing. Press CTRL + Alt + Delete" to restart. So I did and it still gave me the same thing. So I pressed the button once again and then it gave me the option to go into safe mode or normally start it. [Normal started].

I thought my drivers went crappy, so I downloaded the drivers. Now, I'm not sure if its acceptable but I installed the newest drivers over my current drivers. Damn computer went non-responsive multiple times during the installation then it gave me a warning. "Installation Failed. 'view details here'" So I did and it gave me a list, and also my display drivers wouldn't install.
So, I went the the defragging. I've been defragging this computer since Friday night and I've seen over 1,750 fragmented files listed in my defraggler. So I ran it and I'm still seeing so many red blocks. This took 3 days. Even now, after I defragged every directory, it still has non-responsiveness. Even though my AMD had the most problems. I don't know.
I have many theories but to put it straight, I'm a dummy at computer stuff and you know I'm afraid to touch the sensitive stuff. I took a guess it would be my RAM clocking, but I don't think it is. My specs are as shown below:

Operating System: Windows 7 Home Premium 64-bit SP1
CPU: Intel Core i3 540 @ 3.07GHz (average temperature at 26C)
RAM: 8.00GB Dual Channel DDR3 @ 664 MHz (9-9-9-24 clocking)
Motherboard: Intel Corporation DH55HC (XU1) [Avg. temp. 35C]
Graphics: SyncMaster P2050 (1600x900@60Hz)
1024MB ATI Radeon HD 6700 Series (AIT AIB)
Optical Drives: ATAPI iHAS524 B ATA Device
Note: Do clarify if this is bad. Any help you offer me will be so much appreciated.
Bus Speed: 133.0MHz
Rated Bus Speed: 2926.3MHz
Stock Core Speed: 3066MHz
Stock Bus Speed: 133MHz
Physical Memory Usage: 21%. I've NEVER seen it used in the 2-3 years I've owned this computer.

do you have a antivirus / anti malware software installed?
try advanced system care software ( allows you to see the enabled and starting application which you can disable and has a great amount of tool which will help you maintain your pc )
try antimalware bytes and scan the system
also clean you pc

if all fails backup steam games and re install windows

[Riser]

I thought I had a shitty PC Sako...

do you have a antivirus / anti malware software installed?
try advanced system care software ( allows you to see the enabled and starting application which you can disable and has a great amount of tool which will help you maintain your pc )
try antimalware bytes and scan the system
also clean you pc

if all fails backup steam games and re install windows

Thank you for your response. Now I have avast! which is a decent anti-virus software but I do not have an anti-malware program. Give me the name of an anti-malware program that you suggest as very good and I will go into filehippo and download it myself.

Riser, even though I have a powerful computer; mine will always be primitive because simple is better.

already mentioned there

[painkiller 2]

Please check how much fps you get..
1. Close any start up programs which are useless (command: msconfig)
2. Close any driver software unless needed.
3. Run avast in Gaming /Silent mode
4. Delete temp files regularly.
Please use only trusted cleanup software.
These are few basic clean ups

@Macha, Thank you. I appreciate the help and I will try it very soon.
@painkiller 2, My FPS is still highly constant so it can't be my video or graphics. But, thanks for the tips. I'll do so for sure.

Note: For some God-knows-what-reason-that-shouldn't-even-happen, my computer's now acting normally and I had done Jack Doodley to it. As if Nitori Kawashiro just up'd walked into my house, fixed it and left. So weird... but I won't say its fixed until a few more days.

[Call me when humans go extinct]

buy windows8