FIX: Windows Cannot Install Required Files 0x8007025D

Windows 10 has come with many perks but has been one of the hardest systems to update to owing to the numerous errors consumers encounter during installation. One of them is error 0x8007025D that appears and halts installation after a certain percentage. Retrying will only give you the same error. Several people who have sought answers from online indicated that they were running a clean install from their USB drive.

This page is going to explain to you why error 0x8007025D appears. The error might be brought by several issues, but they are all related to the USB buffering system. After a brief explanation of what the error means we will the give you the steps to resolve this error.

What is Error 0x8007025D?

According to windows support, 0x8007025D = ERROR_BAD_COMPRESSION_BUFFER = the specified buffer contains ill-formed data. USB 3.0 uses the Message Signaled Interrupt (MSI) mode for communications with the system. USB 2.0 uses the much older Interrupt Request (IRQ) system. One feature of the new MSI system that USB 3.0 devices use is asynchronous handling of data transfer between the device and system. This requires a buffer through which data is streamed to at high data rates (“SuperSpeed”), which is then decoded by the system. If you receive error 0x8007025D then probably your PNY devices are sending bad or corrupted data to the buffers, your device’s buffers are choked or your device can’t decode the data properly. Here are the reasons why you might be receiving this error.

Corrupt data on the USB drive means that this data cannot be decoded properly thus throwing this error. Corrupt data may be from the corrupt .ISO image file used to create the bootable USB drive. If the file that should be copied is missing or corrupt, you will get this error. The issue might also arise from a bad flash drive that is corrupt of unreadable at a certain section. In the case where you might have plugged in another USB device that is read as another disk drive, the data sent to the buffer by this devices might cause the error.

Bad HDD or SSD space

If the HDD or SSD has a bad sector or record and the Windows installation tries to copy files to this space, an error is returned to the buffer, which in turn displays error 0x8007025D. This can be caused by prolonged use of a disk space (e.g. to play computer games) or storage space that needs to be checked or formatted. A failing HDD can also be the issue causing you error 0x8007025D.

Corrupt or bad RAM

A bad RAM is also likely to be a cause to this error. Since a clean install does not fight for space with other programs, it means that the whole RAM can be dedicated to installing windows 10 so even a tiny corrupt or bad section of the RAM can cause this issue. Windows 10 needs at least 1GB of RAM to install. If data is copied to a bad section of the RAM, then the buffer technology will receive an error therefore displaying error 0x8007025D on your screen.

Solutions to Fix Error 0x8007025D

Here are the things you need to do in order to resolve the issues. If the first method does not work for you, proceed to the next one since this error might be as a result of several different issues. We have listed them beginning from the simplest and least expensive to do, to the hardest and most expensive method.

We are not going to talk about how to install Windows 10 in this page, only on how to resolve the error 0x8007025D. If you need help with the clean installation of Windows 10, please go to our Windows 10 installation guide page here or here.

Method 1: Unplug all other external devices

Unplug all your USB devices and other peripheral devices including the internet cable. Most of the times the Windows installation will throw an error because of bad hardware drivers or outdated drivers.

It also turns out that after copying the files to your computer, windows installation might not need your USB drive anymore. Just unplug your drive and see if the installation will continue from where it left off.

Retry to see if this works, if not, go to the next method.

Method 2: Reduce the size of HDD or SSD disk space and format it

You only need around 20GB of space to install windows 10. We will recommend reducing your installation partition to around 125GB. This will reduces the chances that the space you are copying to is corrupted. You can reduce the disk space by clicking on the “extend” option after choosing to custom install windows 10. Make sure, however, that your hard drive is healthy and not damaged in any way.

If you are doing a clean install, make sure that you format the partition you are installing into. This will iron out the bad sectors and records. To format your partition, choose to install a customized Windows 10, click on the “format” button and accept to format.

Retry the installation.

Method 3: Download a new Windows 10 ISO image file

There is a possibility that the image file you downloaded has a corrupt file that would not be decoded or be copied. It is entirely possible that the file is missing from the USB drive or the disk especially if you downloaded the file via image creation.

You will need to download the files again, create your USB installation drive and then retry the installation. To download Windows 10 .ISO file, go to the Microsoft page here. You will also get instructions on how to download and use the media creation tool to create a bootable USB drive. While installing, make sure to uncheck the Recommended Windows settings and check if that works.

Method 4: Try writing the image onto another USB drive

In the event that your USB drive is corrupt or has an unreadable section, then the buffer technology will detect this error and throw the 0x8007025D error on your screen.

You will therefore need another USB drive for this method. Create the installation files into the new drive and retry the installation. Creating the installation drive from another computer might help resolve the issue.

If you were using USB 3.0 earlier, you could try using a USB 2.0 port since it uses a different technology from USB 3.0 to read the data.

Here is our guide on how to use Rufus to create a bootable Windows 10 USB media device. If you wish to use the Microsoft Media Creation Tool to create your drive, follow the instructions here.

Method 5: Run a memory diagnostic on your RAM and replace a bad RAM stick

If all the above methods have failed, then we are down to the most expensive method here and this is probably the problem with your PC. However, this has solved the error for most of the installations. It seems that the Windows 10 setup would rather not install Windows on your device if it finds a bad RAM, than crashing all the time after installation.

If you have two RAM sticks, each of at least 1GB, you can try removing either and trying the installation (swap if the first one returns an error). You can also check for RAM errors using the memory diagnostics tool in BIOS. To run a memory diagnosis simply:

  1. Immediately on booting your PC. press f2, or f8, or f10 key (depending on your computer) repeatedly, to enter the BIOS setup window.
  2. Use the Left Arrow and Right Arrow keys to select Diagnostics.
  3. Use the Down Arrow and Up Arrow keys to select the Memory Test, and then press the enter key to begin the test. Make note of the errors

If it persists or you find error in your RAM, replace your RAM and retry your installation.


We also received reports from several users that reverting the BIOS to default configurations along with changing the RAM stick solved the problem for them instantly. If all the above methods don’t work, you can try this and see if this fixes the problem.

Kevin Arrows
Kevin is a dynamic and self-motivated information technology professional, with a Thorough knowledge of all facets pertaining to network infrastructure design, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on time and under budget.

Expert Tip

FIX: Windows Cannot Install Required Files 0x8007025D

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