How to Fix EF3T42U1.psr Error?Is EF3T42U1.psr a Virus?

PSR error messages like EF3T42U1.psr error are the most difficult and frustrating puzzle for a common computer user to solve. Those errors are just as difficult as hieroglyphics for us to figure out their meanings, let alone fix them. No one likes to see psr errors like EF3T42U1.psr error pop up on his computer, as it's a signal that there should be something wrong with our computer.

When the computer system fails or relay warning that may affect the system, it will present such a graphic user interface or dialog boxes to attract your attention and need your intervention. If the related problems could not be fixed in time, it will lead to a more serious problem that may cause catastrophic effects to your machine. But no worry! Here are some simple steps that can help you fix EF3T42U1.psr errors easily.

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What is EF3T42U1.psr?

EF3T42U1.psr is an important psr file that is used by EFI PS Plugin, a product of Windows Software Developer. The latest file version of EF3T42U1.psr is 1.0 and its known file MD5 value is b1f2531147954a0b68d6e11a371879f4. This file allows EFI PS Plugin and Windows to work in a proper way. When EFI PS Plugin or Windows system cannot find EF3T42U1.psr file, there will pop up EF3T42U1.psr error messages.

EF3T42U1.psr file information:
File Name:   
   EF3T42U1.psr (Free Scan)
File Description:   
   EFI Rendering plug-in
Product Name:   
   EFI PS Plugin
Product Version:   
   Windows Software Developer
File md5:   
File type:   
   psr file
Security Level(0-5):   
OS Infected:   
   Download EF3T42U1.psr Error Free Scan Tool

EF3T42U1.psr error messages

There are various ways to present EF3T42U1.psr error messages. Listed below are a few common EF3T42U1.psr error messages:

  • EF3T42U1.psr is missing.
  • There was a problem starting EF3T42U1.psr.
  • EF3T42U1.psr was not found.
  • The module "" failed to load.
  • Access violation in module 'EF3T42U1.psr'.
  • EF3T42U1.psr could not be loaded.
  • Runtime error: EF3T42U1.psr.

The above EF3T42U1.psr error messages will pop up when a program that needs EF3T42U1.psr file is starting, running or closing, or during the computer system starts up or shuts down. When it comes to fixing EF3T42U1.psr errors, it's quite important to know when and how your EF3T42U1.psr error happens.

Look for clues in the error message

In most cases, a EF3T42U1.psr error is presented in dialogue boxes. Read the error message carefully to identify if it gives you any clue on what causes the error. The battle wins half if you know when it comes to fixing the EF3T42U1.psr error. Listed below are common causes of EF3T42U1.psr error.

Generally speaking, the EF3T42U1.psr error can be caused by a single or combination reasons below:

  • Missing or damaged EF3T42U1.psr file
  • Malware infections
  • Registry problems
  • Software conflicts
  • Hardware failure
  • Incorrect or corrupt drivers

How to Fix EF3T42U1.psr Error?

NOTE: Make sure you back up your personal documents, files and photos before fixing the error.

Method 1: Restart your computer.

Please try to restart your computer, though this method sounds too simple, sometimes it actually works! It's estimated that more than half of the computer problems can be fixed with a simple restart.

Method 2: Repair damaged or corrupt registry..

Once a Windows OS is installed on a computer, the registry is created to store hardware and software information, system and computer configurations as well as register the right commands between your computer's hardware and software. Registry entries associated with EF3T42U1.psr are saved in the registry and you will receive EF3T42U1.psr error if its related entries in the registry are damaged or corrupt. If the commands are right in the registry, but the registry paths become blocked, errors like EF3T42U1.psr error will appear and your computer speed will become slower. Improper program installation, uninstallation, and malware attacks are the most common causes of registry errors.

Microsoft has not created a PC to perfection, therefore, regular registry maintenance is very necessary to keep your computer error-free and speed it up. It's recommended that you seek help from a professional registry cleaner so that it can fix your registry errors in the timeliest manner without taking the risk of manually editing the registry and causing any further problems on your PC. Click and download this recommended registry repair tool

If you persist in manually editing your registry, it's recommended that you create a full backup of the registry before the fix.


1. To open Registry Editor, hold Windows and R keys on the keyboard.

windows r run

2. Type in regedit in Run box and click OK.

regedit win10

3. In Registry Editor, right click on Computer and click Export.

Backup Registry win10

4. Set a file name and location for the backup file.

5. Click Save button to save the file.

Due to the high risk of breaking down your computer system, we do not provide steps to manually edit the registry and fix EF3T42U1.psr error. Manually edit your registry at your own risk.

Method 3: Run a full virus scan.

Even there are antivirus software installed on your PC, it is still possible that some computer malware, such as viruses, spyware and Trojan horses, can still get the chance to intrude in your system. Some type of malware attempt to modify the content of software and system files, such as EF3T42U1.psr, so as to carry out their malicious activities. Some malware even abuse a name that is very similar to EF3T42U1.psr and scare you buying or paying for useless or scam products.

Here's how:

Step 1. Enter Safe Mode with Networking.

Step 2. Delete Temporary Files.

2.1 Press Windows + R keys simultaneously to open Run command, type cleanmgr and click OK.


2.2 Wait until this process finishes.

cleanmgr process

2.3 Check Temporary files and the type of files you want to delete and then click OK.

cleanmgr process

2.4 Click Delete Files button to proceed.

cleanmgr process

Step 3. If you already have an antivirus software active on your PC, it's recommended that you use a different virus scanner to do this check, since your current antivirus software cannot detect any malware. Click and download this recommended malware detect tool.

Step 4. Run a Virus Scan.

Step 5. Remove Any Detected Viruses.

Step 6. Restart your computer.

Method 4: Reinstall recently installed or uninstalled programs.

EF3T42U1.psr error could be caused by improper installation of a program due to a corrupt installer. If you start to receive EF3T42U1.psr error after you installed a program, try to uninstall and reinstall that program.

Similarly, if you start to receive EF3T42U1.psr error after you uninstall a program, you can try to reinstall that program and then uninstall it either via Programs and features or a trustworthy third-party uninstaller program. When you uninstall a program and are prompted whether or not you want to remove some kind of shared files, you must choose to keep them.

Compared with double-click installation, it's more difficult to completely uninstall a program.

Here's how:

1. Close the program that uses EF3T42U1.psr file.

2. To open Programs and Features,

In Windows vista and 7:

click Start button, type programs in search box, and click Programs and features in the result.

programs and feature win7

Windows 10/8/8.1:

right-click on the Windows Start button, and click Programs and features in the result.

program and features Windows 10

3. Then locate and click on the program that uses EF3T42U1.psr file in the program list and then click on Uninstall button at the top.

uninstall program windows 10

4. Follow the uninstall window to uninstall the program.

If you have difficulty in uninstalling your program, you can try this award-winning uninstaller.

Method 5: Update your computer drivers.

Sometimes, EF3T42U1.psr error could be caused by faulty or obsolete computer drivers. As a result, you should pay close attention and make sure that the drivers of all hardware devices on your computer system are up-to-date. Moreover, before downloading and installing new device drivers, keep in mind that they should be compatible with your Operating System and hardware devices.

Method 6: Run System File Checker command to repair Windows files.

System File Checker also known as sfc /scannow is a powerful Windows utility that is not well known by average Windows users. This utility can scan system files to protect them from being altered. If those protected system files are altered or damaged, this utility will replace them with the original ones.

If you're troubleshooting a Windows problem or errors like EF3T42U1.psr error, running System File Checker would be a good trick.


1. To run System File Checker,

In Windows vista/7/10,

type cmd in start search box. In the result, which appears, right click on cmd and click Run as administrator.

cmd administrator win10

In Windows 8/8.1,

type cmd in start search box. Click settings, in the result which appears, right click on command prompt, and click Run as administrator at the bottom.

cmd administrator win8

2. In the command prompt window that opens, type sfc /scannow and hit Enter key on the keyboard.

sfc scannow windows8

3. The sfc utility will scan for a while and if any corrupted files are found, replace them on re-boot.

Method 7: Roll back your system with System Restore.

The main idea of System Restore utility is to roll back your system files and programs to a time when your computer system and programs were working properly. It becomes very helpful when it comes to troubleshooting computer errors like EF3T42U1.psr as you can easily roll back system files, registry entries, and installed programs etc.


1. To run System Restore,

In Windows vista/7/10,

type system restore in start search box. In the result, which appears, click on create a restore point.

System Restore in Windows 10

In Windows 8/8.1,

type system restore in start search box. Click settings, in the result which appears, and click on create a restore point.

System Restore in Windows 8

2. Click on C disk, click System Restore button and then OK.

system restore

3. click Next.

system restore next

4. When the wizard window opens, choose a restore point.

select restore point

Note: If you're not sure what programs will be affected, click on the restore point and then Scan for affected programs button to know more.

5. Click Next, follow the wizard and wait until the restore finishes.

Method 8: Install available Windows updates.

Have you ever wondered why it is so important to install Windows updates? Microsoft frequently releases security patches for its Windows software and addresses other bugs and issues in Windows. So maybe installing those updates can help you fix problems like EF3T42U1.psr error.


1. To install Windows updates, open Control Panel, select View by Large icons and click Windows Update.

windows update

2. In the Window Update panel that opens, click Check for updates first.

check for update

3. If there is any available update, click Install Updates button.

win8 system update

Method 9: Reinstall Windows system.

Reinstalling your Windows system can erase everything including EF3T42U1.psr error from your computer, but this will take a lot of time to reload the system and reinstall all your programs. Before doing so, make sure you back up all of your documents, personal files, pictures, and many other important things.


Note: Instead of going through the tedious, time-consuming, and risk-laden process of manually fixing EF3T42U1.psr error, you can save a lot of time and aggravation by using specialized software to do the job for you.

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Does EF3T42U1.psr error still persist?

Please contact us if your error still pops up after you've tried the above fixes.

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