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Windows Computer Running Slowly
- High-level of disk fragmentation.
- Third-party or unwanted browser plug-ins.
- Multiple antivirus security programs installed.
- Possible infection from a virus or other malicious software.
- Fragmentation makes your hard disk do extra work that can slow down your computer.
- To defragment your hard disk, Open Disk Defragmenter applet in the Control Panel.
- Before you decide to defragment the disk, determine if the disk needs to be defragmented or not. Click Analyze disk.
- Once Windows is finished analyzing the disk, you can check the percentage of fragmentation on the disk in the Last Run column. If the number is above 10%, you should defragment the disk.
- Click Defragment disk. Disk Defragmenter might take from several minutes to a few hours to finish, depending on the size and degree of fragmentation.
- Start the browser you use for surfing the net.
- Depending on your browser, do one of the following.
- For Internet Explorer: On the Tools menu, click Manage Add-ons.
- For Mozilla Firefox: On the top-right corner, click the Open menu icon, and click Add-ons. In the Add-ons Manager page, select Extensions.
- For Google Chrome: On the top-right corner, click the Customize and control Google Chrome icon, and click Settings. Under Chrome, click Extensions.
- Select the add-ons one at a time and disable them.
- If the browser is fast, the problem is with one of the toolbars. Enable the browser plug-in one at a time to find the malicious one, and keep it disabled.
- Check if you have any third-party Security or Firewall software present.
- Open the “Add or Remove Program” control panel applet.
- If you find a Non-Norton security software, select it, and uninstall it.
- Test the speed of your computer by performing common tasks such as browsing, opening Microsoft Office applications, and other such task.
- If the problem persists go to Step 4.
- Download a third-party free tool from a reputable company such as Microsoft, Norton, McAfee and others.
- Norton offers a tool called the Power Eraser tool from https://support.norton.com/sp/en/us/norton-download-install/current/solutions/kb20100824120155EN_EndUserProfile_en_us.
- Follow the instructions to install this tool, and scan your computer for viruses.