PC Eventually Freezing after hours of operation, weird symptoms happen

[sherisdoppel]

Hi, I've been having this problem for three months now, and I didn't make a huge deal out of it since I didn't have any major work to do.
However, I recently started working heavily on my PC that this problem has been causing me a lot of damage.
It would be GREATLY APPRECIATED if you can help me.


WAYS TO REPRODUCE
I cannot reproduce this problem because it's happening at a random time, but I can tell you that it happens after hours of just PC being turned on for usually from 5 hours to 25 hours.

SYMPTOM 1. PROBLEMATIC PS/2 PORT DEVICES
When I type, it doesn't feel as responsive. Like when I press and hold one button down it would:
[type that letter] -> [wait about 0.5 seconds] -> [repeatedly type that letter; about 25-35 words per second]

However, when the problem starts happening it would:
[type that letter] -> [wait about 0.5 seconds] -> [repeatedly type that letter; about 7 words per second]

I can recreate the problem by simply disconnecting and reconnecting the PS/2 cable, or I can freshly restart my computer and the problem is guaranteed to happen after a certain number of hours of usage.

This symptom happens no matter what, usually kicks in before other symptoms.


SYMPTOM 2. CONSTANT SHORT HANGS
My PC would start freezing for 1-3 seconds. This means during the freeze time, the computer will absolutely hang. My mouse wouldn't move, my temperature monitor would freeze and everything else would simply freeze. It would keep freezing, coming back on, and repeat.
What's interesting is that my mouse will become a cursor that looks like when you try to run old software from your system and the colors all looks really bad and corrupted (consists of yellow and a bit of pinki. Note that Windows7 cursor consists of white, black and a little bit of grey for shadows)
This will happen randomly. This usually happens when I don't turn my PC on for about 8 hours and turn back on and operate for about an hour or more.
The less time I operated my PC with, more likely this symptom will stop. Meaning, this does stop occasionally. However, if this starts happening after hours and hours of operation, then it will not stop. Then it's time to shutdown the computer. Note that shutting down computer will take about 10 minutes after this symptom.


SYMPTOM 3. PLAIN FREEZE.
This will only happen after 5 hours or more of operation. Computer will simply hang forever. This does not happen when I play games, but it may happen since the only game I play is CSS or Dota 2, but I've never experienced this while playing those two games. It usually happens when I'm writing a document or browsing a web which is what I spend my most time on. So a non-stressing environment still causes this issue.
When this happens, I have to force shutdown.
Here's what's interesting. If I want to restart this computer right after I shut it down forcefully, then it will freeze again after only 5-10 minutes of operation. To avoid this, I have to wait about 1 minute and then turn it back on. Then it's fine.

Sounds like a temperature problem right? Nope. I have temp monitoring software with Always On Top gadget feature on and the temps aren't really skyrocketing: CPU Core around 35'C, GPU core around 43'C, HDD around 30'C.


I've done sfc /scannow, and it didn't help much.
What I'm guessing is a hardware problem, but I'm not sure which one... Please help me, please.

Specs:
i7 2600K @ 3.4 GHz
GTX 560 Ti Twn Frozr
8GB RAM

I've been using this system for 2 years and without change of equipment it started happening.
No bluescreen of death whatsoever.

Please help me!!

 

[Mellon Head]

It might be a memory issue. Try running memtest86+ overnight, or for as long as it will go without freezing and see if there are any errors. You might have a bad stick of RAM.

Memtest86+ is here: http://www.memtest.org/

 

[sherisdoppel]

Hi Mellon Head! Thank you so much for adding a response!
I'm starting a project that means a lot to me in my life right now and it's very important for me to get this fixed.

I'll run it overnight and get the result back to this thread tomorrow.
Again, thank you and hopefully you can continue to help me after the follow up!

Is it possible for my RAM to go bad after 2 years of fine working state?
How often does this happen?

 

[Mellon Head]

It is possible. Most electronics will fail at some point. Some sooner than others.

 

[Genghis Thom]

Please check out this link and see if it applies to you. It seems the current Nvidia drivers may be causing your problems.

 

[vhernandez7]

@sherrisdoppel
My thoughts are this is related to the RAM. Try using different RAM, even if it's a smaller amount (GBs). Run a memory test and let us know.

 

[sherisdoppel]

Hi guys! Thank you so much for your inputs! I feel so grateful!
I think it was the graphics card! I updated my driver to the latest one, which I believe is supposed to at least improve the freezing issue, and I've had my computer for about 48 hours now and BOOM! No freezing issues just yet.
I'm going to have this on until this Friday and see if this is fixed.

This is such a good news to me. Thank you all.
I'll report back if the problem persists!