How come my computer starts running slow after 15 minutes?

by on July 8, 2011

Q: Out of nowhere my computer started running slow and constantly skipping. I didn’t know what to do so i shut it down, which took 20 minutes to happen. When i restarted it it was fine but then after 15 minutes i had to repeat the same process. What could be wrong??

8 Responses to “How come my computer starts running slow after 15 minutes?”

    There is some processor/program running in the background that is slowing down your computer, possibly an anti-virus scan or maybe a system update.

    To find the culprit, right click on your taskbar at the bottom of the screen, and click ‘Task Manager’. After a few seconds a window called ‘Windows Task Manager’ will appear.

    Click on the ‘Processes’ tab, this shows all the programs that are currently running on your computer.

    Click on the column header labeled CPU so that the programs are sorted in order of which are using the highest percent of your CPU.

    There will probably be a single program using close to 100% of your CPU. The left most column will have the name of the program. If you aren’t sure what it is, do a google search for that program name. This will tell you what program is slowing down the computer.

    If it winds up being something like an anti-virus scan or Windows Update I suggest just leaving the computer alone for a while so it can get the task taken care of.

    If you need additional assistance with the problem I can offer remote system support for a small fee. Send me an e-mail at for more information if needed.


      But what if there is nothing close to 100%?


    On the Windows Task Manager, click on the Performance Tab.

    Watch the CPU Usage bar on the left for a minute as well as the Memory Bar below it while the computer is acting slow

    Post the results here, also write down what it says in the section labeled Physical Memory.


    The CPU Usage is low but occasionally jumps to about 29% max . The Memory Bar stays in the 1.80 GB range.
    In the Physical Memory box it says:
    Total 5940
    Cached 2786
    Available 4102
    Free 1456


    Run Belarc Advisor: This will create a report that shows what software is running on the computer. I can then use that to assess if any of these programs are causing a problem.

    e-mail the resulting report to

    Any information sent will be deleted after review.


    Will do thanks


    Wait its not really allowing me to send it.


    In that case the best I can offer is a remote service call. e-mail me if you’re interested.