Fix slow computer problems

It is important to run your computer at peak performance. Over time, regular use of your computer builds up unneeded files and fragments your hard disk. Bad computer habits also contribute to computer slowness. Using multiple programs at once, putting the computer to sleep instead of regularly restarting, browsing the Internet with multiple browser windows, adding plug-ins and services, and neglecting to perform regular maintenance. These all can add up to poor computer performance.

Best practices

  • Here are some best practices to keep your computer running at its best:

    • Restart your computer at least once a day

    • Have minimal programs load at startup

    • Do not run multiple security programs together

    • Remove unwanted browser plug-ins

    • Delete temporary and unwanted files

    • Run Windows Updates at regular intervals or enable automatic updates

    • Update all your programs regularly

    • Continually defragment your hard disk

Norton can help with many of these. Follow these steps to have Norton optimize your computer.


Download and run Norton Power Eraser

  1. Download Norton Power Eraser.

  2. Click Save.

  3. Select the location as Desktop, and then click Save.

  4. To run Norton Power Eraser, double click the NPE.exe file.

    If the User Account Control window prompts, click Yes or Continue.

  5. Read the license agreement, and click Accept.

  6. In the Norton Power Eraser window, click the Scan for Risks icon.

  7. By default, Norton Power Eraser performs a Rootkit scan and requires a system restart. When you see a prompt to restart the computer, click Restart. If you do not want to include the Rootkit scan, go to Settings, and uncheck the option Include Rootkit scan (Requires a system restart).

  8. After the computer is restarted, the scan starts automatically. Follow the on-screen instructions.


Manage browser add-ons

    You can also have slow Internet performance if you have multiple browser windows open or a weak WiFi signal. Unwanted add-ons on your browser may affect the browser load time. We recommend that you disable add-ons one at a time and find out which add-on causes the slowdown.

  1. Start your browser.

  2. Depending on your browser, do one of the following:

    • For Microsoft Edge: On the top-right corner, click Settings and more, and click Extensions.

    • 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. In the Settings page, click Extensions.

    • For Microsoft Edge: On the top-right corner, click Settings and more icon, and click Extensions.

  3. Select the add-ons one at a time and disable them.

    If the Internet slows down after adding a particular add-on, then keep it disabled.


Manage startup items

    You may have many programs loading at startup that can slow down the startup process. With Norton's Startup Manager feature, we can help you manage your startup programs and reduce the startup time

  1. Start Norton.

    If you see the My Norton window, next to Device Security, click Open.

  2. In the Norton window, double-click Performance, and then click Startup Manager.

  3. In the Startup Manager window, under Delay Start, select the program that you want to delay.

    If you are not sure which programs to delay, review the result under Resource Usage. If a program has high resource usage, we recommend that you add it to Delay Start.

  4. Click Apply, and then click Close.


Remove temporary and unwanted files

    Norton File Cleanup removes the temporary files for Internet Explorer and Mozilla Firefox and unwanted files from the Windows Temporary folder. Over time, temporary files can slow down Internet browsing and computer performance.

  1. Start Norton.

    If you see the My Norton window, next to Device Security, click Open.

  2. In the Norton window, double-click Performance, and then click File Cleanup.

  3. After the temporary files are removed, click Close.

    To remove temporary Internet files on Google Chrome, continue to the next line. If you do not have Google Chrome installed, skip to Step 4.

  4. To open the Clear browsing data window on Google Chrome, press the Ctrl + Shift + Del keys on your keyboard.

  5. In the Clear browsing data window, at the top, from the drop-down menu, select the beginning of time.

  6. The options are selected by default in the window. Click Clear browsing data.


Uninstall any non-Norton security product

    Each security software is designed to work independently on a computer. Multiple security solutions on a computer are generally not optimized to work together, resulting in performance degradation.

  1. Press the Windows + R keys to open the Run dialog box.

  2. Type in the following text, and then press Enter.


  3. In the list of currently installed programs, select the non-Norton security product, and then click Uninstall or Remove.

  4. Follow the on-screen instructions.

  5. When the uninstall completes, restart the computer.

    You can also read the program documentation or contact the program manufacturer for instructions to remove a non-Norton security product from your computer.

Wondering why your PC runs slow? With the Norton Ultimate Help Desk service, our experts help to optimize your PC settings to improve startup speed and restore like-new performance to your older computer.

Learn more

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DOCID: v59066932
Operating System: Windows
Last modified: 08/02/2020