OS getting slow when HDD is on full load

Alright, I have built this PC 5 years ago and it ran very fast without problems. Recently it started acting weird when the HDD was on load like programs loading slow and working with them, loading windows and the weirdest opening and loading pages with chrome/ie/mozilla. Everything got updated and now with fresh installation of Windows 10 and newest chrome it's still not working as it should. I ran few scans with MHDD and it has shown a lot of errors and delays then I ran it again with remapping on but from that point I think things got worse. I scanned with HDD Regeneration HDAT2 but still no hope. Erased the drive with write zeros still no hope. My question is could this be 100% HDD fault and if is, can it be used as secondary hard drive ONLY to store music and useless data? Below you can see some useful info about my config and the test I've ran, If something is missing let me know

HDD info

HDD Info with CrystalDiskInfo

HDD on IDLE

HDD on LOAD

S.M.A.R.T. values compared to other users

HDS log

CDI Log

MB: Foxconn P67A-S
CPU: Intel i5 2500
RAM: 6GB 1033
GPU: GTS 450 2GB GDDR3
HDD: Western Digital 1TB WD10EARS

Mellon Head said:

If the hard disk is starting to fail, I wouldn't use it for anything. I would backup the data, replace it, and throw it away.

You didn't say, but what did S.M.A.R.T. report the health of the drive to be?

According to Windows, WD Data Life guard it says that it is OK but according to the logs I've posted above I'm sure that it is NOT OK. HERE is another S.M.A.R.T. log I've made just now. My main question was is it 100% that the HDD is making these hangs and freezes and slow downs when on load as explained above because I was told that the motherboard could do the same thing.

Tried a clean startup yet? Troubleshoot Application Conflicts by Performing a Clean Startup

GokAy said:

Tried a clean startup yet? Troubleshoot Application Conflicts by Performing a Clean Startup

That was the first thing I did with Windows 8.1, it was something I remembered a long time ago from this forum I installed Windows 10 and the problem is still there. No wonder that this is a hardware problem and it somewhat connected to the HDD for sure since the logs say that is partially dead, but I am not sure if other component is connected to it like motherboard or the SATA cables. The weird thing is that the HDD is SATA III, connected to SATA III slot on the motherboard and in BIOS it shows that the HDD is connected to SATA III but CrystalDiskInfo and HardDiskSentiel show that is connected to SATA II.

Try loading defaults in BIOS or clear CMOS (much better, check motherboard manual). But perhaps best is to get a new one, 4 reallocated sectors seem low, but they usually add up fast. Do you have any spare HDDs to try?

Also get a WD Blue at least, new greens are not good for OS drives. If you can afford a 120-250GB SSD and another HDD for storage, you won't regret.

GokAy said:

Try loading defaults in BIOS or clear CMOS (much better, check motherboard manual). But perhaps best is to get a new one, 4 reallocated sectors seem low, but they usually add up fast. Do you have any spare HDDs to try?

Also get a WD Blue at least, new greens are not good for OS drives. If you can afford a 120-250GB SSD and another HDD for storage, you won't regret.

I just did a reset from BIOS but I guess it's the same, tomorrow I will clear the CMOS. I do not have any spare drive to try out but I was thinking of getting WD10EZEX with Samsung 120GB SSD.

I have seen only a couple of cases like this where a reset helps. CMOS reset usually is the same thing, but seldom it helps (no idea why).

Regarding HDD/SSD: Good choices, you won't regret.

GokAy said:

I have seen only a couple of cases like this where a reset helps. CMOS reset usually is the same thing, but seldom it helps (no idea why).

Regarding HDD/SSD: Good choices, you won't regret.

Alright it might sound dumb but actually on the HDD it says SATA 3Gb/s and every time I read subconsciously was thinking that it is SATA III I bought the WD10EZEX and connected it to SATA III port and it's blazing fast, I'll take the SSD later and install Windows on it. I wanted to ask is it ok to keep the old WD10EARS in system only for keeping some data that I don't actually need or backup since it kinda works?

Mellon Head said:

Regarding the SSD choice, I would go with a 250 GB Samsung if you can afford it. They've really come down in price and that extra room for the OS and some vital programs really comes in handy.

Where I live the 250 GB Samsung is actually double the price of 2 Samsung 120s and I don't really need that much since I mostly use it for regular daily tasks and university projects. Currently I have 150GB partition for Win10 and 850GB separate for other things. But thanks for the suggestion that you gave me