Why won't Microsoft Flight Simulator download or install on PC?
If Microsoft Flight Simulator will not download or install on PC, the problem is usually the platform layer (Microsoft Store, Xbox app, Steam or Gaming Services), the chosen packages folder, low free space, or security software blocking file extraction. Fix the stage that fails instead of immediately reinstalling everything.
Pin down where the install is failing
The quickest fix comes from identifying the stage that breaks: the storefront download, the small launcher install, sign-in, or the large in-game content packages.
| Symptom | Usual cause | Best first fix |
|---|---|---|
| The Microsoft Store or Xbox app never starts the download | Store cache, Gaming Services trouble, or account mismatch | Sign into the same Microsoft account in both apps, then update or repair them |
| Steam installs a small amount, then MSFS gets stuck downloading the rest | Bad packages path, blocked folder writes, or Xbox sign-in trouble | Verify Steam files and choose a simple local packages folder |
| The in-game download freezes on one package or restarts near the end | Corrupt partial file, antivirus blocking, or an unstable drive/network | Close MSFS, clear the incomplete package, then relaunch with security exclusions in place |
| The sim appears installed but will not open | That is a launch problem rather than an install problem | Use a launch-specific fix list instead of repeating the install |
If the sim is fully installed and only refuses to open, use our separate fix list for MSFS not launching on PC; that is a different fault.
How do you fix Microsoft Flight Simulator not installing on PC?
Start with the platform and storage checks before touching the big package files, because most failed installs come from accounts, permissions or a bad install path rather than corrupt aircraft data.
- Sign into the right accounts. On the Microsoft Store/Xbox version, Windows, the Store and the Xbox app should all be using the same Microsoft account. On Steam, Steam owns the purchase, but Microsoft Flight Simulator still depends on Microsoft and Xbox sign-in when you first launch it.
- Check free space on every drive involved. The launcher may sit on
C:while the main packages live on another drive. MSFS needs extra room while it unpacks files, so a nearly full system drive can break the install even when the target drive looks large enough. - Update and repair the platform apps. Install pending Windows updates, then update the Microsoft Store, Xbox app and Gaming Services if you use that edition. If those apps fail to download anything, use Windows' Repair or Reset option for the affected app before blaming MSFS itself.
- Use a simple local packages folder. When MSFS asks where to store its big content download, choose a short path on an internal SSD, such as a dedicated folder on another drive. Avoid OneDrive-synchronised folders, removable drives, network locations and protected library folders that security software watches aggressively.
- Keep permissions consistent. Do not run Steam as administrator and the sim normally, or the reverse. Mixed privilege levels are a common reason the launcher can start but cannot write to the packages folder.
- Temporarily remove file blocking. Antivirus, anti-ransomware features and Windows Controlled Folder Access can silently stop package extraction. Add the install folders as exclusions or disable the blocking feature while you install, then turn it back on afterwards.
- Clear the partial package that always fails. If the in-game download stops on the same file every time, close MSFS completely and remove the incomplete item from the
Officialpackages folder, often inside a parent folder namedOneStoreorSteam. If you cannot identify the bad item safely, renaming the wholePackagesfolder is slower but safer than deleting random files. - Cut out network interruptions. Pause other large downloads, disable VPN or proxy software, stop Windows from sleeping the PC, and use wired Ethernet if possible. A weak Wi-Fi link often shows up as a package download that loops, slows to a crawl or restarts near the end.
- Verify or reinstall only after the above. Steam users should run file verification from Steam. Store/Xbox users should repair or reset the app first; if the install is still tangled, follow our clean reinstall guide for Microsoft Flight Simulator on PC.
What if the Microsoft Store or Xbox app never starts the download?
If the download never leaves Queued, fails instantly, or the install button does nothing, the fault is usually with the Store layer rather than with Microsoft Flight Simulator itself.
Start by signing out and back into both the Microsoft Store and the Xbox app, making sure they use the same account. Then update both apps and Gaming Services. If other Store apps also refuse to install, use Windows' repair or reset tools for the Store and Xbox app before attempting MSFS again.
This is where people often misdiagnose a permissions issue as a bandwidth issue. If nothing downloads at all, do not waste time deleting aircraft packages yet; fix the storefront layer first.
What if Steam installs MSFS but the big download gets stuck?
On Steam, a successful Steam install does not mean the whole simulator is installed; it often means only the launcher is in place and the large content download still has to happen inside MSFS.
Verify the game files in Steam, then relaunch the sim and choose a local packages folder that you can write to. If the content download still loops or stalls, the cause is usually the target folder, a blocked write, or a broken Xbox sign-in rather than Steam itself.
If the installation completes but the sim will not open afterwards, use our separate fix list for MSFS not launching on PC instead of repeating the same download steps.
Does the install drive matter?
Yes. The safest place for Microsoft Flight Simulator's packages is an internal SSD with a short, simple path and plenty of spare space.
External USB drives, sleepy laptop drives and synchronised cloud folders are common trouble spots. They disconnect, pause or lock files just long enough for MSFS to report a generic download error. If your machine is also near the bottom end of what the sim can reasonably run, check the PC specs Microsoft Flight Simulator really needs, because borderline hardware often turns an install problem into a launch problem on the next restart.
When should you reinstall Microsoft Flight Simulator?
Reinstall only after you have checked accounts, free space, platform apps, security software and the packages path. A full reinstall is slow and it does not fix a broken Store, Xbox app or Gaming Services layer by itself.
One last trap we see a lot: the base sim is fine, but an aircraft or livery is missing, so people assume the whole installation failed. If only extra content is absent, use our guide to fix add-on aircraft that do not appear after installation rather than wiping the simulator.