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: System and Svchost high disk activity - PC no longer usable

12 Jan 2017   #1

Windows 7 HomePremium SP1 64bit
System and Svchost high disk activity - PC no longer usable

For the last two weeks I'm experiencing a high disk activity from System (PID 4), Svchost.exe and/or explorer.exe
What's particularly interesting is that for the first hour after switching on the PC works fine and then one of these 3 services (or a combination of them) kicks in and renders my PC totally unusable.

Restarting doesn't help. Switching off/on sometimes helps but the offenders are back within an hour.

Here are the steps I've done so far:
1. Eliminated my antivirus (I ran the PC with the antivirus completely disabled and the problem persisted);
2. Uninstalled ALL software that I can live without;
3. Disabled Prefetch, Autofetch and Indexing services;
4. Ran CHKDSK - no issues found whatsoever;
5. Disabled Windows firewall.

I've also tried to break down the processes to see what is actually using the disk but Microsoft seem to have deleted most of the older KB pages. I found some utils here Sysinternals Process Utilities but I can't use any of them. They just blink for a second and then disappear.

Is there a way to break the processes down?

Have you experienced similar issues and do you know how to fix it?

Any help would be greatly appreciated.


My System SpecsSystem Spec
12 Jan 2017   #2

Win-7-Pro64bit 7-H-Prem-64bit

Hi and welcome to SevenForums,
Windows updates has in the past been the largest issue with svchost
Review post #2 here
Windows Update will not update and I've tried multiple fixes
My System SpecsSystem Spec
12 Jan 2017   #3

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64 +Linux_VMs +Chromium_VM

If the suggestion by TZ doesn't help, i would run a System File Check (SFC):
SFC /SCANNOW Command - System File Checker
My System SpecsSystem Spec

17 Jan 2017   #4

Windows 7 HomePremium SP1 64bit

DavidE, thanks, I ran the utility but it didn't find any inconsistencies.

ThrashZone, thank you. I've followed your instructions plus I've ran a registry cleaner and uninstalled more software.

It is much better now, so part of the problem was indeed the Windows auto-updater. However, performance-wise the machine is still very far from what it used to be prior to this. Ok, it's no longer freezing up, but the System is still hogging too much resources and everything I do takes twice as long.

What am I missing? Is there a way to cap the disk write rate?
My System SpecsSystem Spec
17 Jan 2017   #5

win 8 32 bit

We're is the file running from a lot of malware uses this but often not in the windows folders ransom ware uses it while it encrypts your files
My System SpecsSystem Spec
17 Jan 2017   #6

Win-7-Pro64bit 7-H-Prem-64bit

How many other updates did you get and which one or were both updates missing ?
You might jump to just loading the security only update posted here ?
KB3207752 and KB3212642 Update for Windows 7 SP1
My System SpecsSystem Spec
17 Jan 2017   #7

W7 home premium 32bit/W7HP 64bit/w10 tp insider ring


Quote   Quote: Originally Posted by BlackBerryQ10 View Post
plus I've ran a registry cleaner
If you have run one previously then its possible that that was the start of your problems.
Unless you know EXACTLY what your doing and its follow on effects you end up in all sorts of problems

My System SpecsSystem Spec

 System and Svchost high disk activity - PC no longer usable

Thread Tools

Similar help and support threads
Thread Forum
High main disk drive activity
Since this evening my main hard drive has 100% disk activity, and little to no programs are even turned on, even on idle its max usage. Ive tried restarting the PC several times, but it didnt help, the drive has still 100% disk activity. The HDD light keeps flickering and i can hear the disk...
General Discussion
SSD no longer appears in Disk Management, or My Computer, no Activity
Skill level: Beginner I've been toying with the idea of swapping the hard drive out of my Acer Aspire 5740-5780 laptop with an Intel SSD 330 to improve performance. So I used Norton Ghost 15.0 to copy my data to my new Intel SSD. So after that was done I swapped hard drives, and booted up. My...
Hardware & Devices
High disk activity when Windows not used
Hi, my Windows is doing something when I do not use it. The disk makes a lot of noise (r/w) but as soon as I touch the mouse or keyboard it stops. What can be the reason ? I have AVG as antivirus and no other residential software running (appart ATI and sound card softs) thanks
General Discussion
Win 7 64 bit slowdowns high disk activity
Hi Everyone, I had previously started a thread: in the performance section, which discussed my issues, from which we concluded was hardware related. I am not sure...
Hardware & Devices
High Disk Activity! Help!
Hey! I have windows 7 64bit running on my desktop PC. I have Intel Core 2 Quad Q8200 @2.34GHZ Processor, 4 GB Ram, Asus P5QPL-AM motherboard and WDC WD32000AAKS-00L9A0 ATA device 320GB HDD. I am using this system since last one year or so, first i had Windows XP installed on it, and after...
Hardware & Devices

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 03:14.
Twitter Facebook Google+