Remove Undefined.com from Firefox – Easy Methods to Get Rid of Undefined.com Hijacker from Different Browsers

What is this that I can't get rid of when I open a new tab? //// http://www.undefined.com/?uid=undefined&uc=undefined&ap=undefined&source=undefined&page=newta

What is Undefined.com?

Undefined.com is a recognized as a browser hijacker that has ability to compromise all brands of internet browsers such as Internet Explorer, Google Chrome, Mozilla Firefox, Safari, etc. It is disturbing to have this browser hijacker in your computer because it can change your default browser home page and search engine without your permission and bring a lot of pop-up ads or unwanted programs to your computer.

Besides, Undefined.com may install startup items to your system to enable its running on Windows start up. If your computer is infected by this hijacker, your browsers may easily get unwanted extensions and toolbars which may keep track of your browsing activity and collect your browsing data. It is disturbing to have all them in your computer.

Commonly, Undefined.com is often promoted via free downloads. If you download software that might have bundled with this browser hijacker and install it without reading End Users License Agreements and selecting additional bundles, you will install additional troubles to your computer.

How to Remove Undefined.com Browser Hijacker?

The following passage will show some effective removal guides for this nasty browser hijacker. Please refer to them and remove it in case it brings you more troubles.

If you cannot handle this browser hijacker expertly, you are recommended to use the below removal tools - SpyHunter Anti-Malware to fix your PC.

(SpyHunter offers free scanner for malware detection and there will be no other bundles or conflicts with your software. Please feel relieved about usage.)

Method 1: Watch Relevant Removal Video for Help

Method 2: Manually Erase Undefined.com from IE/FF/Chrome

Step 1: End suspicious process in Windows Task Manager.

Right click the blank Windows Taskbar and select Start Task Manager to open. If your IE is infected and stuck in Undefined.com, you should end the main iexplorer.exe. FF and Chrome are respectively corresponding to firefox.exe and chrome.exe.

Step 2: Remove Bedidfbcif and ProPCCleaner from control panel.

Windows 8 & Windows 8.1

1. Slide the mouse cursor to the bottom right corner of your screen.
2. Click Settings on the Charm bar and go to Control Panel.
3. Select Uninstall a program and remove unwanted program.

Windows Vista & Windows 7

1. Open the Start menu and click Control Panel.
2. Go to Uninstall a program and remove wanted program.

Windows XP

1. Open the Start menu and navigate to Control Panel.
2. Select Add or remove programs and uninstall unwanted program.

Step 3: Remove browser hijacker from your browser and restore changes.

Internet Explorer

1. Open Internet Explorer, then click on the gear icon (Tools for Windows XP users) at the top (far right), then select Manage add-ons.



2. From the Toolbars and Extensions tab, select suspicious toolbar and right click on the item and the click Disable.



3. On Search Providers, remove unwanted search provider from the list and enable the one you want.



4. Click the General tab and move to the Home Page. Overwrite/remove the Home Page URL and click OK.



5. Open Internet Explorer, then click on the gear icon (Tools for Windows XP users) at the top (far right), then select Internet Option > advanced > reset



Mozilla Firefox

1. Click on the button at the top right corner to open Menu > Add-ons > Extensions



2. Find suspicious related add-ons and delete them.




3. Simultaneously tap Alt+T keys and select Options. Click the General tab and move to the Home Page. Overwrite/remove the Home Page URL and click OK.

4. Open Firefox, press Alt + H, and select Troubleshooting Information > reset



Google Chrome.

1. Click on the Customize icon(wrench or 3 bar icon) next to the address bar and navigate to Tools > Extensions.



2. Find suspicious related add-ons and delete them



3. Move to Search and click Manage search engines…Click X on the URL of the search tool you want to remove. Click Done.



4. Select settings > advanced settings > reset

Step 4: Erase Undefined.com from local disk.

Show hidden folder: start menu >> type 'folder options' and hit enter >> 'View' >> show hidden folder

Delete suspicious files from the folders below.

%AppData%\<random>.exe
%CommonAppData%\<random>.exe
C:\Windows\Temp\<random>.exe
%temp%\<random>.exe
C:\Program Files\<random>

Step 5: Delete corrupted registry entries.

Press Win & R on your keyboard. Type 'regedit' and hit enter.

Click Edit > Find...

HKEY_LOCAL_MACHINE\SOFTWARE\<random>Software
HKEY_LOCAL_MACHINE\SOFTWARE\supWPM
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Wpm

After finishing all these steps, you may have already get rid of this browser hijacker. Good luck to you.