Remove Undefined.com Pop-up HIjacker Completely

About Undefined.com 

undefined.com stealing my homepage. Every time I start Firefox , instead of google , undefined.com opens. (http://www.undefined.com/?uid=undefined&uc=undefined&ap=undefined&source=undefined&page=homepage&implementation_id=email_0.0.12). I have changed it back to google, but it changes back the next time I open my home page. Does anybody else have this problem? If so, what do I do to correct it? Thank You in advance for the help.

Undefined.com is a malicious redirect site which is capable to change your browser setting and redirect your webpage to unwanted websites. Undefined.com is usually bundled with certain free programs that you normally download and install. These bundles include a licensing agreement that you must accept to download and install the software. Once infiltrates into the computer, Undefined.com will compromise your browser and modify browser setting. When you surf the Internet, Undefined.com is capable to pop up on your browser automatically. Undefined.com will compromise the browser and read/modify/adds browser cookies. Undefined.com will capture all web browser behaviors and can modify displayed web pages.

Undefined.com will take over your browser and always redirect your search. It may connect to the Internet to request data and download files. Undefined.com may compromise the security of all data on the affected PC. It is suggested to remove Undefined.com from the computer as soon as possible to avoid further damage. If you're seeing pop-up ads that won't go away, ads from sources you don't recognize, or you suddenly have a homepage that you know you didn't set, you might have an unwanted program called malware installed on your computer. It is better to scan your computer with a powerful anti-spyware program like Spyhunter to check out the problem and remove viruses.

How to remove Undefined.com

Method 1: Manually removal of Undefined.com from the browser completely

Method 2: Automatically remove Undefined.com with SpyHunter safely

Method 1: Manual removal

Step 1: Stop related running processes in Windows Task Manager first.

Press CTRL+ALT+DEL or CTRL+SHIFT+ESC or Press the Start button->click on the Run option->Type in taskmgr and press OK.

Step 2: Remove any infection related program from Control Panel.

Windows Vista and Windows 7

1. Open the Start menu.
2. Click Control Panel and click Uninstall a program.
3. Remove the related programs.

Windows XP

1. Open the Start menu.
2. Click Control Panel and then click Add or Remove Programs.
3. Uninstall related programs.


Windows 8

1. Press Win+R.
2. Type in control panel and click OK.
3. Select Uninstall a program.
4. Remove the related programs.

Step 3: Remove Undefined.com from your browsers.

Reset Internet Explorer

Reset Google Chrome

Reset Mozilla Firefox

Step 4: Show all hidden files and clean all the malicious files.

(1).Click the Start button and choose Control Panel, clicking Appearance and Personalization, to find Folder Options then double-click on it.
(2).In the pop-up dialog box, click the View tab and uncheck Hide protected operating system files (Recommended).

Step 5: Go to the Registry Editor and remove all related registry entries.

(Steps: Hit Win+R keys and then type regedit in Run box to search)

Method  2:  Remove with SpyHunter

It is safe and easy to remove  Undefined.com by Spyhunter.

Step 1: Click the following button to download SpyHunter.

Step 2: Save it into your computer and click on the Run choice to install it step by step.

Step 3: Scan the computer and delete all threats.

Note: To keep  Undefined.com on the computer is not a wise choice. This infection can bring in many other potentially virus and damage. Install Spyhunter can help you remove  Undefined.com and also protect your computer.

（Gary）