delta.crx is a malicious file, which presence and active running within Task Manager should be considered as a warning sign. This file is run by delta-homes.com search provider, which is known as a potentially harmful browser hijacker. Other dangerous files, including delta.dll, deltaApp.dll, and deltaEng.dll are also directly related to the aforementioned browser hijacker.
All reputable security vendors have delta-homes.com hijacker included into the database of potentially unwanted programs and urge people NOT to keep it installed on computers. There are at least several important reasons for that. First of all, it is usually spread in a stealthy manner, i.e. via software packages as an additional attachment that will be installed by default unless you deselect it. It has been found that it may even be attached to such popular software like VLC, Media Player, Flash Player, any download manager and so on. Moreover, delta-homes.com may replace a default start page, search provider, and a new tab window without user's authorization required.
In addition, this search provider is commercial and primarily seeks to promote its affiliate parties. Consequently, you may receive doubtful links and ads within search results resulting in continuous redirects to doubtful third-party websites. Not to mention, it's not a secret that third-party websites that seek to boost traffic commonly contain questionable or potentially harmful content, starting from fake update prompts and ending with software installers, which once installed may cause further PC-related issues. Therefore, it seems that your browsing may not only be disrupted by forcing you to use doubtful search site instead Google, Bing or Yahoo. Keeping delta-homes.com virus installed may lead to further computer infection.
If you haven't noticed any signs of delta-homes.com hijack except delta.crx running on Windows Task Manager, it's obvious that the plug-in has already been installed and will hijack your web browser as soon as you reopen it. Delta.crx file serves as a Browser Helper Object (BHO), which runs all the time when the computer is rebooted. Moreover, it prevents the user or other software from replacing delta-homes.com search. Finally, it may be used as for spying on users and collecting browsing-related information about them. Keeping all this in mind, you should not ignore the emergence of delta.crx because it may lead to further computer-related problems. If you want to get rid of all potentially unwanted programs from your machine, you are strongly advised to check if with a reputable anti-spyware, such as ReimageIntego, SpyHunter 5Combo Cleaner or Malwarebytes.