- Gaming and consoles
- PC games and launchers
IS-MF-01
Epic Games IS-MF-01 on PC: install file failed to relocate
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
IS-MF-01 means the Epic Games Launcher could not relocate a file while downloading a game install. Epic's steps are a Windows clean boot to rule out background applications, then uninstalling and reinstalling the game.
Safety first
Stop and check this first
- A clean boot is a test: re-enable your services and startup programs afterwards and never leave your antivirus permanently disabled; Epic only asks to disable background applications to find the conflict.
Safe checks you can perform
- Windows clean boot
- Uninstall and reinstall the game
- Return to normal startup
Leave these tasks to a qualified professional
- Do not attempt this professional task: Epic Games player support
- Do not attempt this professional task: Security software maker or PC technician
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Epic Games player support
What they doIf IS-MF-01 persists after a clean boot and a reinstall, Epic support reviews the launcher logs for the file that failed to relocate.
They must show youwhich file failed according to the logs and the case number.
In writingthe case number, the game, the install folder and the steps already tried.
Security software maker or PC technician
What they doIf the clean boot shows a security program or other utility blocks the file move, its maker's support or a PC technician sets an exception without removing your protection.
They must show youthe exception added and that protection stays on.
In writingthe program involved and the exception configured.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Windows clean boot
- Who:
- you.
- How:
- follow Microsoft's How to perform a clean boot in Windows, which Epic links: disable non-Microsoft services and startup programs and restart; on a Mac, start in Safe Mode as Apple describes.
- Result that matters:
- whether the installation completes with background applications off.
- If it completes:
- one of the disabled programs was blocking the file move.
- If it fails the same way:
- uninstall and reinstall the game.
- Evidence to keep:
- the list of services and startup items you disabled.
Evidence: IS-MF-01: File failed to relocate successfully
Uninstall and reinstall the game
- Who:
- you.
- How:
- uninstall the game from the Epic Games Launcher as Epic describes in its uninstall article, then install it again.
- Result that matters:
- whether a fresh installation completes without IS-MF-01.
- If it completes:
- the partial installation was damaged.
- If it fails again:
- contact Epic support with the step where it stops.
- Evidence to keep:
- the date of the reinstall and the progress percentage where it stopped, if it fails.
Evidence: IS-MF-01: File failed to relocate successfully
Return to normal startup
- Who:
- you.
- How:
- after the test, re-enable the services and startup programs you disabled, one group at a time, restarting after each group.
- Result that matters:
- whether the game still installs or runs once your usual programs are back.
- If a group brings the error back:
- that group contains the conflicting program.
- If everything works:
- the conflict was temporary.
- Evidence to keep:
- which group, if any, brought the error back.
Evidence: IS-MF-01: File failed to relocate successfully
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Gaming and consoles
- Brand
- Epic Games
- Product type
- PC games and launchers
Known code variants
- El archivo no se pudo reubicar correctamente
- epic games IS-MF-01
- error IS-MF-01
- File failed to relocate successfully
- IS MF 01
- ISMF01
What it means
Epic Games explains that IS-MF-01 can appear while installing a game because the launcher is unable to relocate a file during the download, that is, it cannot move a downloaded file into its final place. Epic points to background applications as the first suspect and suggests a clean boot, which starts Windows with only essential services, and then an uninstall and reinstall of the game. The code does not prove a disk fault: it records that one file move failed.
Warnings and stop conditions
- Loweditorial warning
A clean boot is a test: re-enable your services and startup programs afterwards and never leave your antivirus permanently disabled; Epic only asks to disable background applications to find the conflict.
Evidence: IS-MF-01: File failed to relocate successfully
Symptoms and causes
Probable causes · in order
- Background application holding the fileCommon
Epic's first step is disabling background applications with a clean boot. It fits if the install completes once only essential services run.
Evidence: IS-MF-01: File failed to relocate successfully
- Damaged partial installationPossible
Epic's second step is uninstalling and reinstalling the game. It fits when the error repeats at the same point even after a clean boot.
Evidence: IS-MF-01: File failed to relocate successfully
Virtual technician
Does IS-MF-01 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
IS-MF-01: File failed to relocate successfully
Epic Games · 2026 · official_doc
Was this entry useful?