Does this sound like what you are seeing right now? You see pop-up ads from bidsystem.com while browsing at web sites that generally don’t advertise in pop-up windows. The pop-ups manage to get round the built-in pop-up blockers in Mozilla Firefox, Google Chrome, Internet Explorer or Safari. Perhaps the bidsystem.com pop-ups show up when clicking search results from Google? Or does the pop-ups turn up even when you’re not browsing?

Here’s how the bidsystem.com pop-up looked like when I got it on my computer:

Does this sound like your system, you almost certainly have some adware installed on your computer that pops up the bidsystem.com ads. Contacting the owner of the website would be a waste of time. They are not responsible for the ads. I’ll do my best to help you remove the bidsystem.com pop-up in this blog post.

Those that have been reading this blog already know this, but here we go: Not long ago I dedicated a few of my lab computers and deliberately installed some adware programs on them. Since then I’ve been following the behaviour on these systems to see what kinds of advertisements that are displayed. I’m also looking on other interesting things such as if the adware updates itself, or if it installs additional unwanted software on the systems. I first observed the bidsystem.com pop-up on one of these lab machines.

pdamv.bidsystem.com and bidsystem.com resolves to the 204.137.28.31 IP address.

So, how do you remove the bidsystem.com pop-up ads? On the machine where I got the bidsystem.com ads I had PriceHorse, PriceLess, OfferBoulevard and Salus installed. I removed them with FreeFixer and that stopped the bidsystem.com pop-ups and all the other ads I was getting in Mozilla Firefox.

Judging from Alexa’s traffic rank, bidsystem.com is getting quite a lot of traffic:

The problem with pop-ups like this one is that it can be initiated by many variants of adware. This makes it impossible to say exactly what you need to remove to stop the pop-ups.

So, what can be done to solve the problem? To remove the bidsystem.com pop-up ads you need to examine your machine for adware or other types of unwanted software and uninstall it. Here’s my suggested removal procedure:

1. What software do you have installed if you look in the Add/Remove programs dialog in the Windows Control Panel? Something that you don’t remember installing yourself or that was recently installed?
2. How about your add-ons you have in your browsers. Anything in the list that you don’t remember installing?
3. If that didn’t help, you can give FreeFixer a try. FreeFixer is built to assist users when manually tracking down adware and other types of unwanted software. It is a freeware utility that I’ve been working since 2006 and it scans your machine at lots of locations where unwanted software is known to hook into your machine. If you would like to get additional details about a file in FreeFixer’s scan result, you can just click the More Info link for that file and a web page with a VirusTotal report will open up, which can be very useful to determine if the file is safe or malware:

   

Here’s a video guide showing how to remove pop-up ads with FreeFixer:

Did you find any adware on your machine? Did that stop the bidsystem.com ads? Please post the name of the adware you uninstalled from your machine in the comment below.

Thank you!