Does A Flashing Internet Light Mean I Have A Virus On My Computer?

Making sure that your computer is safe can be a little worrisome at times.

You always have to be sure that you are aware of all of the little things that can go wrong.

One minute it might be that the hard drive is constantly running, the next second it might be that the mouse on your computer is flickering weird.


All of these incidents may be signs that there is something wrong with your computer or it might be signs that a simple program is running a little too long.

Because of all of the threats that are out there now we have become very paranoid but, even though you are paranoid, it does not mean that you are wrong.

A common problem that some people get worried about is when their internet light keeps flashing.

Let’s take a look at this phenomenon and see what you can do about it.

Reasons Why The Light May Be Flashing

There are several reasons why the light on your router may be flashing even though you are not on the internet at the time.

It could be a piece of malware on your system and I will discuss the signs of that later in the article.

But there are a lot of legitimate reasons why the light on your router is flashing as well.

For you to understand why the light might be flashing you have to understand a little bit more on how the computer communicates with the internet.

There are several programs that communicate with the internet on your computer.

So even though you may not have the browser running there are other programs that can be doing the communication.

This can include programs such as your IM client and even the operating system itself.

The operating system will call home to see if there are any updates that it needs to download.

Also, your router will even call places over the internet that you are not aware of.

Every now and then it will call to your ISP and get certain status updates.

So while it may seem like your internet light should not be going off, there are really some good reasons why it actually should.

If You Really Think There Is A Threat

While there are some really good reasons why your internet light should be going off there are also reasons why it could indicate a threat as well.

If the internet light keeps flashing constantly for hours at a time then you might have a problem.

Or if the internet light keeps flashing and the speed of your computer is suddenly decreased you might have a problem then as well.

If you think that you really should be concerned then you can solve the problem by having your antivirus software do a full scan of your computer.

That way you can see if there is a problem or not.

There are a dozen reasons why your internet light could be flashing but if you are really concerned then you should take a closer look.

About Lee Munson

Lee's non-technical background allows him to write about internet security in a clear way that is understandable to both IT professionals and people just like you who need simple answers to your security questions.


  1. xsploitedsec says:

    Yeah, the registry hasn’t changed much unfortunately since win98 even lol!

    Even with common skills such as these though, malware can easily go unnoticed.

    For example I was unaware, until a couple days ago that I had been secretly spamming emails, thanks to some malware I had found on my pc a few nights ago when I did my regular system checks. I didn’t even know until I happen to be doing some unrelated tests on another pc and noticed strange packets going to random hosts via port 445.

    • You’re showing your age there by referencing Windows 98!
      (Shhhh, don’t tell anyone I remember Win 3.1 and that was after the days of the glorious ZX81!)

      Whilst I’m no expert I’d like to think I’m sufficiently clued up about malware though I must confess that chucking out spam is not something I would necessarily pick up on quickly either.

  2. xsploitedsec says:

    If you are that worried about incoming/outgoing packets, you should consider learning how to use a packet capture tool such as wireshark. Always know what processes are running on your pc, especially if they are winsock based ones. Get to know what processes and services are needed to operate windows and programs you use. Consider all others unwanted and close / delete them. Keep your autostart clean! regedit, msconfig are your best friends.

    • I remember, however many years ago it was, playing around with my first PC. Msconfig was the first tool that I ever used.

      Personally, I wish regedit was my best friend but I am still a little hesitant about hacking around with the registry.

      As for wireshark, I agree, having found that particular tool a week or two ago.


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