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Windows 7: Intermittent 100% CPU load, slow down, can't find the cause

1 Week Ago   #51

Win 7 Pro 64 bit

Hello again

I unistalled Chrome using the paid version of AShampoo Uninstaller 7. I didn't have the Uninstaller program running when I installed Chrome, but, nevertheless, it seemed to uninstall it. When I do a search on c: and d: for chrome*.* I do not find anything apart from a directory in which there is the Chrome install file. Also, there is no refermce to CHrome in the "Processes" list on Windows Task Manager. So I think we can ssume that it is uninstalled and not running.

Howver, with Firefox running, after a few minutes the CPU load jumped to 100% an dthe Memory usage to 7GB (out of 8GB installed). This was with about five tabs open in Firefox, one on Yahoo Mail and the others on various pages on a well-known news site. So the problem persists.

Thanks for the the list other tools. I had the Hook Scanner running for a while, and then DiskPulse, but neither of them showed anything that jumped out at me as unusual.

Are there some further systematic steps I could try with these or the other tools you suggested?

Thanks and regards

My System SpecsSystem Spec
1 Week Ago   #52
F22 Simpilot

Windows 7 Ultimate x64

Are you still using Ashampoo WinOptimizer? I hesitate using any so-called "Windows optimizers."

Can you please run SuperAntiSpyware. Make sure you disable your anti-virus before using it.

I would scan all downloads you intend on installing at Virus Total. I see some things in your Autorun file I would not install.

When you run Firefox, run Ring3 API Hook scanner and see if you get any hooks show up.

Remove Malware & Spyware with Anti-Malware Software | Superantispyware
My System SpecsSystem Spec
1 Week Ago   #53

Win 7 Pro 64 bit

I do have ASmapoo WinOptimizer installed, but I don't run it very often. Is it unsafe?

Have run SuperAntiSpyware - nothing found after quick scan, will try a full scan.

Also, will try the Hook Scanner when running Firefox in a moment.

In the meantime: which are the items in my Startup which give cause for concern?

My System SpecsSystem Spec

1 Week Ago   #54

Win 7 Pro 64 bit

Update: Running Ring3 API Hook Scanner whil Firefox is running produces no result i.e. the Hook Scann screen has the output 'form' dispalyed (Process, API, Address, Hook Address, Hook Module, Type) but the grid below is unpopulated, even after running the scanner.

Can I re-enable Microsoft Secuirty Essentials anti-virus now, and what are the next steps?

PS I also tried running the PC in Safe Mode again, just to make sure that the processor CPU Load issue did not re-occur under those conditions. I had three tabs open in Firefox, each on YouTube playing a long video (>1 hour). The CPU load stayed very low (<10%) and the video on each tab seemed to played flawlessly, without and stalling or other problems - quite inlike what happens when running in 'normal' Windows mode. So definitley looks like something like a driver or other item which is loaded as part of the startup sequence (visible or hidden) which is going rogue.
My System SpecsSystem Spec
1 Week Ago   #55

Win 7 Pro 64 bit

StreamArmor downloaded and run through VirusTotal: two positive results, all others OK (green).

Is this is aproble, or likley false positives? How can you tell when looking at results from VirusTotal? In the meantime, I haven't proceeded with StreamArmor.

Responses to points raised in the last few posts woudl also be greatly appreciated.


Attached Thumbnails
Intermittent 100% CPU load, slow down, can't find the cause-stream-armor-virustotal-result_1.jpg  
My System SpecsSystem Spec
1 Week Ago   #56
F22 Simpilot

Windows 7 Ultimate x64

Stream Armor is fine, just false positives. Especially since everything else checks out. You can expect that with a scanner like Virus Total or Herd Protect since they both use multiple anti-virus engines.

Yes, you can turn on your anti-virus again. I just wanted it off when you ran SuperAntiSpyware. You only use MSE? I wouldn't trust that as a good full prof anti-virus. I thought I saw some other anti-virus installed though other than MSE. I have my parents use Bitdefender Free. It's low on resources, good detection engine and is cloud-based which helps nab polymorphic malware. Read this:

That WinOptimizer is more than likely snake oil and I wouldn't trust it. Those kinds of programs tend to create more issues than it's worth. You can always optimize your PC manually.

If you uninstall WinOptimizer, see if the problem still persists. If so try the following. Type in msconfig into search. Go to Selective startup. Uncheck Load startup items. Reboot PC. See if problem still persists. If problem is gone, reenable startup items and go to the Startup tab and uncheck 4 or so at a time. Reboot until you can single out what startup item may be the issue.

If it isn't a startup item, try a selective startup without services. If problem is gone do the same process of elimination as you did with startup items, but this time with services using msconfig.
My System SpecsSystem Spec
1 Week Ago   #57
F22 Simpilot

Windows 7 Ultimate x64

Okay, I just downloaded and scanned Stream Armor and I only got one detection other than your four. Did you get it from here?

Stream Armor : Free Tool to Scan & Clean Malicious Alternate Data Streams (ADS) |

Scroll towards the bottom of the page.
My System SpecsSystem Spec
1 Week Ago   #58

Win 7 Pro 64 bit

Yup, that's where I got it from. Re-submitted to VirusTotal and again got two (probably false) positives - see screen shot.

Have run StreamArmor and it detected tow items worthy of investigation. Both were image files (i.e. pictures) resulting from scans with my scanner. Can't remember of they were .jpg or .pdf - have deleted both. Sounds very much like false positives - results were 'green' not amber or red. So, essentially, nothing found with StreamArmor, I think.

Attached Thumbnails
Intermittent 100% CPU load, slow down, can't find the cause-2019-03-13-17_27_39-virustotal-opera.png  
My System SpecsSystem Spec

 Intermittent 100% CPU load, slow down, can't find the cause

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