Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: PC Eventually Freezing after hours of operation, weird symptoms happen

08 Dec 2013   #1

Windows 7 Ultimate 64bit
PC Eventually Freezing after hours of operation, weird symptoms happen

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.

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.

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.

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.

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.

i7 2600K @ 3.4 GHz
GTX 560 Ti Twn Frozr

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!!

My System SpecsSystem Spec
08 Dec 2013   #2
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot

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:
My System SpecsSystem Spec
08 Dec 2013   #3

Windows 7 Ultimate 64bit

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?
My System SpecsSystem Spec

09 Dec 2013   #4
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot

It is possible. Most electronics will fail at some point. Some sooner than others.
My System SpecsSystem Spec
10 Dec 2013   #5
Genghis Thom

Microsoft Windows 7 Home Premium 64-bit Service Pack 1

Please check out this link and see if it applies to you. It seems the current Nvidia drivers may be causing your problems.
My System SpecsSystem Spec
10 Dec 2013   #6

Windows 7 Professional x32

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.
My System SpecsSystem Spec
12 Dec 2013   #7

Windows 7 Ultimate 64bit

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!
My System SpecsSystem Spec

 PC Eventually Freezing after hours of operation, weird symptoms happen

Thread Tools

Similar help and support threads
Thread Forum
Something weird happen when i did a posting here today.
I try to do a posting and when i submit for a new thread it took me to my modem setting page. I went back to this forum and of course there was no posting i tried again and it took me back to the modem setting page. It seems to be okay now but those anyone have a explanation on why this is...
Chillout Room
DistributedCOM 10016: Computer Freezing Then Eventually BSOD
I recentently had to rebuild most of my computer as my friend had spilled cough syrup over most of the parts. I had to replace the Motherboard, CPU and GPU. I kept in the old hard-drives, ram and diskdrive as they had not been spilled on. I had reformatted my computer with a fresh install of...
BSOD Help and Support
freezing( locks up) every few hours, Event ID 41
I recently made my first computer build but the windows keeps stop responding(the screen freezes and the mouse does not respond). I know it is not a hardware issue because I have other operating systems install on it and they work fine. Sometimes when it locks up I heard a buzzing sound from my...
BSOD Help and Support
Touchpad scrolling - weird things happen
I had a problem with choosing the right category for my topic, because I don't really know whether is something wrong with my touchpad or is the driver broken or maybe something else entirely. Let me start by saying, that I updated the driver for my touchpad using the newest one from Synaptics (old...
Hardware & Devices
Aero works, but weird things happen
I activated Aero and tried it out. Love the looks of it, but once I had it running I noticed that everytime I'd come back into the system from a display power down (from Screen Saver), the desktop would slow down to a crawl. I thought at first it was locked up but I saw the mouse cursor was still...
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 08:50.
Twitter Facebook Google+