Completely Remove Undefined.com Redirect from IE/ Chrome/ Firefox/ Edge

What is undefined.com?

Undefined.com is recognized as a pesky browser redirect, which is closely connected with adware or potentially unwanted programs. Normally, it is promoted via every opening like third party software, corrupted websites, spam email attachments, malicious pop-ups, etc.

A Screenshot of Undefined.com

After it infiltrates your PC, undefined.com generates web traffic, collects sales leads for other dubious sites, and will display advertisements and sponsored links within your IE, Chrome, Firefox as well as Edge. Gradually, your computer will results in poor performance, such as slow speed and poor network environment.

In a word, the longer undefined.com stays on your PC the more damages it will cause. Therefore, it is better for you to remove undefined.com from the infected PC as early as possible in case of further damages.

How to remove undefined.com completely?

STEP 1: Remove Undefined.com from Computer

• Manual Removal
• Automatic Removal with SpyHunter (Quick and Safe)

STEP 2: Speed up Your PC with RegCure Pro

STEP 1: Remove Undefined.com from Computer

• Manual Removal

Step 1: Uninstall suspicious programs from Control Panel.

Windows 10:

1. Tap the Windows key + I to launch Settings.
2. Click on Control Panel.
3. Open Uninstall a program.
4. Delete any suspicious program.

Windows 8 or Windows 8.1:

1. Press the Windows key + Q.
2. Type Control Panel and click the icon.
3. Go to Uninstall a program and remove any suspicious program.

Windows 7 or Windows Vista:

1. Launch the Start menu and select Control Panel.
2. Access Uninstall a program.
3. Remove any suspicious program.

Windows XP:

1. Access the Start menu.
2. Open Control Panel.
3. Launch Add or Remove Programs and eliminate any suspicious program.

Step 2: Remove Undefined.com from your browsers.

Internet Explorer:

1. Open Internet Explorer, click on the gear icon, choose "Internet options", go to General tab, enter your favorite website address, and click "Apply".
2. On General tab, click "Delete…" button going to the "Delete Browsing History" window, click "Delete". Click "OK" to close the Internet Options window.
3. Click "Start", find "Internet Explorer" and then right click on it, choose "properties". On the pop-up window, go to Shortcut tab, delete the extension after ".exe" in Target, and click "OK".

Google Chrome:

1. Open Google Chrome, click on the icon menu (top right), select "Settings", and then go to On startup option, click "Set pages", delete the unwanted website address and then "OK".
2. Go to Appearance option, check "Show Home button", and then click "Change". On the pop-up window, delete the unwanted website address in Open this page option, click "OK", and then uncheck "Show Home button".
3. Go to History tab, click "Clear browsing date…" button. On the confirm window, click "Clear browsing date", and then close Chrome.
4. Click "Start", find "Google Chrome", right click on it, and select "properties". On the pop-up window, go to Shortcut tab, delete the extension after ".exe" in Target, and click "OK".

Mozilla Firefox:

1. Open Mozilla Firefox, click on the icon menu (top right) and select "Options". Go to General tab, click "Restore to Default", and then click "OK".
2. Here select "History", click the "Clear Recent History…" button. On the pop-up window, click "Clear Now".
3. Click "Start", find "Mozilla Firefox", right click on it, and select "properties". On the pop-up window, go to Shortcut tab, delete the extension after ".exe" in Target, and click "OK".

Microsoft Edge:

1. Type your homepage URL (here takes google.com as an example.) in the search bar next to the Windows 10 logo on the bottom off the screen, and hit Enter.
2. Microsoft Edge opened up with a new tab for Google. You can see undefined.com still opens in a new tab that doesn't have focus.
3. Click the "X" to close Edge. Do not click on undefined.com tab or it will get focus again.

Step 3: Remove suspicious browser extensions.

Internet Explorer:

Do as the pictures tell you to disable and remove unwanted add-ons from your IE.

Google Chrome:

1. Menu icon > More Tools > Extensions.
2. Search for related ones and remove them by clicking on the trashcan icon.

Mozilla Firefox:

Follow the steps as the pictures show you. Remove unwanted add-ons from "Extensions" and "Plugins".

Step 4: Remove all harmful registries from Registry Editor.

Press Win+R key to open the Run box. Type "regedit" in the pop-up box and click OK to open the Registry Editor. And then remove all related or suspicious registries.

HKEY_CURRENT_USER\software\Microsoft\Internet Explorer\Main\Start Page="http://<random>.com"
HKEY_CURRENT_USER\software\Microsoft\Internet Explorer\Main\Start Page Redirect="http://<random>.com"
HKEY_CURRENT_USER\software\Microsoft\Internet Explorer\SearchScopes\{random name}
HKEY_CURRENT_USER\software\Microsoft\Internet Explorer\SearchUrl\"http://<random>.com"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\"http://<random>.com"
HKEY_CURRENT_MACHINE\SOFTWARE\Microsoft\Internet Explorer\SearchScopes\{random name}

Step 5: Restart you PC to make changes.

• Automatic Removal with SpyHunter (Quick and Safe)

What can SpyHunter do for you?

1. Give your PC intuitive real-time protection.
2. Detect, remove and block spyware, rootkits, adware, keyloggers, cookies, trojans, worms and other types of malware.
3. Spyware HelpDesk generates free custom malware fixes specific to your PC
4. Allow you to restore backed up objects.

Here shows how it works.

Step 1: Download SpyHunter to kill Undefined.com.

Step 2: After you download it, run the file to install it on your PC properly.

Step 3: Launch the program, uncheck "Quick Scan", and then click "Scan Computer Now!" to make a full scan for your PC.

Step 4: Remove any malicious files or components of Undefined.com.

STEP 2: Speed up Your PC with RegCure Pro

What can RegCure Pro do for you?

1. Fix system errors
2. Remove malware
3. Improve startup
4. Defrag memory
5. Clean up your PC

You can download and use RegCure Pro with confidence for it doesn't contain any additional items and conflict with your current used antivirus program. Here show how it works.

Step 1: Download RegCure Pro.

Use the safe link here to safely download the tool.

Step 2: Run the file that you downloaded on your PC.

Follow the installation guides to install RegCure Pro step by step.

Step 3: Launch RegCure and scan for junk files.

Step 4: Click "Fix All" and then RegCure Pro will do the rest for you.

Warm Reminder:

If you're not confident to manually remove Undefined.com, you can use SpyHunter. Novices are recommended to take the automatic steps. Don't delete your registry entries randomly or you may crash your system.

For clean master to double check and optimize your PC, please click here for RegCure Pro.

Good luck and be safe online!