Ann, this Dregol malware infects browsers, so eliminating it will depend on which (infected) browsers you are using.
You might have downloaded some freebie that included an invisible version of the malware. Here are some instructions (with links) that may help you get rid of it.
Check out the list of add-ons to determine where the malware is attached and then remove it with an uninstall. (Make sure you have a good backup of your system before attempting to make changes in the system.
If you don't feel comfortable doing it yourself and if you have (for instance) protection via Norton, they will do it for you--it is part of the protection package you are paying for.
It might suffice to switch to a new browser and then uninstall the infected one.
I think that is what I did, but I'm not sure. Otherwise, check out the following instructions.
Dregol.com infects your Internet Explorer when a browser hijacker that comes with freeware sets it as your homepage or a search engine. It can install Internet Explorer extension or browser helper object or just replace your search engine and homepage with different web pages used for promotion. So, if you want to remove Dregol.com from Internet Explorer, then you should remove this component(s) and restore your favorite homepage and search engine.
http://malware-detective.com/remove-...rnet-explorer/
How to remove Dregol Search in Chrome, Firefox and IE
The adware called Dregol is trending on security discussion boards currently, so the article below is going to sort of aggregate the known information about this threat and add in-house research data. The most important part of the present entry is dedicated to the instructions on Dregol removal and ways to restore the system settings that the virus changed.
It doesn’t take a rocket scientist or an IT guru to tell a normal web service enhancement tool from a malicious one. The key differentiation here is in the realm of an app’s activity and symptoms it causes. Normal add-ons won’t make changes to the browser settings unless authorized to do so, whereas adware doesn’t ask the user for approval. The Dregol Search extension, for instance, circumvents the user consent phase while drastically modifying the way
Chrome, Firefox and Internet Explorer operate on a PC. Likewise, people get this program without really being aware that it’s getting inside, rather than install it voluntarily. This behind-the-scenes installation is powered by a multitude of applications that covertly host the potentially unwanted payload. During the setup of affiliated software, you might actually get a notification about extra promotions, but this information is overlooked by most users because it’s embedded in the default installation options. The types of such underhand shipper programs vary, but in most cases these are free multimedia tools, streaming video downloaders, poorly rated OS maintenance utilities and cracked variants of software updates that are critical for system stability.
http://keonesoftware.com/guides/dregol/
Remove Dregol Search from Mozilla Firefox, Google Chrome and Internet Explorer
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Types of Threats » Remove Dregol Search from Mozilla Firefox, Google Chrome and Internet Explorer
Dregol is a growing adware menace distributed via popular open source software installs, the overall contamination surface thus being large enough for the security industry to sound some alarm bells. It’s not a nasty virus, identity theft infection or scareware, but the trouble it causes victims is more than substantial as it affects the usage area that computers these days are nearly worthless without – web browsing. Also, this sample is not a code that executes and does filthy things in the background. Instead, you can easily spot it on your browser add-ons list, but there is a delineation from the normal extensions: you never allowed this one to be installed, at least you didn’t do it knowingly; and the imbalance of privileges that it gets is striking. Another non-standard feature of this app is that it cannot be removed as easily as the rest of your web service enhancements. All of these attributes add up to the clear-cut classification of Dregol as adware.
http://nabzsoftware.com/types-of-threats/dregol