McAfee Antivirus Error 401

McAfee antivirus error 401 is a runtime error and can occur during the program installation of windows shut down or startup. It is very important to keep track of error 401. This information is helpful while troubleshooting the error 401.

What are the symptoms of error 401?

·  Your machine displays Error 401 on screen and active program window gets crashed

·  Your running program frequently crashes wit error message 401

·  Your machine responds slowly to input devices like keyboard and mouse

·  Your machine freezes in a periodic manner

What are the causes of McAfee error 401?

Damaged Windows registry entries related to McAfee antivirus software

Malware or virus attack damaged the McAfee antivirus related software files

Incomplete or corrupted download related to McAfee antivirus software

Some other software program might have deleted some files

How to fix the McAfee error 401?

Conduct a full scan of your machine

It is highly recommended to conduct a complete antivirus scan of your machine. Malware or virus attack could be one of the reasons for the McAfee error 401

Windows registry changes

Corrupted or damaged windows registry entries related to McAfee antivirus could be one of the major reasons behind the McAfee error 401. Manually editing the windows registry entries is one solution to fix this error 401. However manual changes to the windows registry entries are a complex task, a small change can damage the machine. So it should be performed under the experts’ supervision only. Microsoft gold partner also has developed some readymade tools like WinThruster for Windows registry changes. These tools create an automatic backup of your old registry entries.

Clean temporary or junk files

After long term usage of machine and web surfing, our machine accumulates a lot of garbage and junk files. It is important to remove these temporary and junk files. You can use the inbuilt wizard-like disk cleanup using command cleanmgr command to clean up these junk files. Open the command prompt and type the command “cleanmgr”. This will open the dialog box; select the relevant files you want to remove.

Reinstalling the McAfee antivirus

McAfee error 401 can be fixed by reinstalling the McAfee antivirus software. Go to the control panel and search for the programs and features tab. Now in programs and features tab select the relevant McAfee related entries and click on the uninstall button. Once the process is complete restart your system.

For installing a fresh copy of McAfee antivirus, visit the official website of the McAfee antivirus and download the latest version of McAfee antivirus. Follow the instructions to complete the installation process.

Restore the system

If all the above fixes won’t work, then restore the system to its best working previous version. Windows system restores utility will restore your windows to the previous version. Open the search option and type the systems restore. This will start a system restore wizard, follow the guidelines and restore your system to a previous best working version.