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PC slowed down massively.


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I wanted to try figure this out for myself but after trying most of what I've read online the problem is still present. So basically the problem is when I open 2+ tabs my browser slows down hugely and goes unresponsive, this is not due to my processor or RAM i'm pretty sure the slow down happens now and then between 10-20 minutes however it doesn't occur when i'm only playing games etc. 


The solutions I've tried (however not thorough) so any insight is appreciated.


Disk Defrag

Downloading Malwarebytes and doing a scan. 

Dowloading adwcleaner and doing a scan.

Downloading Amigabit and preforming scans/cleaning registry.

Full Norton Anti-Virus scan.

Checking that HDD is not in PIO mode. 


I did however after running Malwarebytes find a lot of PUP files (around 200) and I removed all of them however the problem is still present.


Any help on what I could do/what is wrong is appreciated. Any information you need I can supply :)


Thanks in advance.

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Hello and :welcome: :
Malware is only one possible reason for a slow computer.
You already tried several fixes, but perhaps something in this pinned topic will help: Slow PC? - Start here
EDIT: And, you might want to try resetting your browsers:

Please visit each of the following sites and lets reset all of your browsers back to defaults to prevent unexpected issues.
If you are not using one of the browsers but it is installed then you may want to consider uninstalling it as older versions of some software can pose an increase in the potential for an infection to get in.

Internet Explorer
How to reset Internet Explorer settings

Click on Help / Troubleshooting Information then click on the Reset Firefox button.

Start by disabling Sync
How To Delete Your Google Chrome Browser Sync Data
Chrome - Reset browser settings
If that fails then Uninstall Google Chrome and do not reinstall until sure the system is clean.

If that doesn't resolve your issue, in order to better assist you, it would help to have a bit of system info. :)
So, please run the diagnostic tools below and then please ATTACH the resulting logs to your next reply.
P.S. FWIW, the use of Registry Cleaners/Tweakers/Optimizers is generally not recommended. They can cause more harm than good, as explained here: Do I need a Windows Registry Cleaner?

Please run the DDS scanner and send back both logs as attachments to your next reply.
If you are running Windows 8.1, please skip this step.

Download DDS from one of the locations below and save it to your Desktop:

Temporarily disable any script blocker if your Anti-Virus/Anti-Malware has it.
How To Temporarily Disable Your Anti-virus, Firewall And Anti-malware Programs

Once downloaded you can disconnect from the Internet and disable your Ant-Virus temporarily if needed.
Then double click dds.scr or dds.com to run the tool.
Click the Run button if prompted with an Open File - Security Warning dialog box.
A black DOS console should open and run for a moment.

  • When done, DDS will open two (2) logs:
    • DDS.txt
    • Attach.txt
  • Save both reports to your desktop
  • Please include both of the following logs in your next reply as an attachment: DDS.txt and Attach.txt
  • You can ignore the note about zipping the Attach.txt file and just post it or attach it.

Please run the FRST tool and send back both logs as attachments to your next reply.

Download Farbar Recovery Scan Tool and save it to your desktop.

Note: You need to run the version compatible with your system. If you are not sure which version applies to your system, download both of them and try to run them. The one that runs will be the right version.

  • Double-click to run it. When the tool opens click Yes to disclaimer.
  • Press Scan button.
  • It will make a log (FRST.txt) in the same directory the tool is run. Please attach it to your next reply.
  • The first time the tool is run, it makes also another log (Addition.txt). Please attach it to your next reply.
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  • Root Admin

The computer appears to either be currently infected or possibly damaged from a previous infection. I would suggest following the advice from the topic here Available Assistance for Possibly Infected Computers and having one of the Experts assist you with looking into your issue.

Thank you

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Hi, @bstock:
You wrote:

I too have a slow (XP)computer running avast + malwarebytes software - pretty sure its clean.
If I turn off malwarebytes then my computer seems to return to normal

First: please see this pinned topic for some suggestions: Slow PC? - Start here

Next, please follow the steps in this pinned topic to run a couple of diagnostic scanners: Diagnostic Logs
THEN, please start a NEW, SEPARATE topic using this clickable cjfj.png button.
Please ATTACH the logs from the Diagnostic Scanners to that new post.

The staff and experts will be able to more easily provide both you and the OP with individual help to get you both up and running.

Thanks for your patience and understanding,



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