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30088-1015

Microsoft 365 30088-1015 in Office: network or disk space

Verified with sources2 sourcesReviewed Oct 3, 2026
Technician coming? See the 2 steps they must show you

Risk level

Low

Usually safe to check without specialist tools.

Urgency

Medium

Quick answer

The Office install stopped with 30088-1015, 0-1011 or 30183-1011. Microsoft links these codes to the connection or to low disk space: free up drive space before you retry.

Safety first

Stop and check this first

  • If you turn off antivirus or firewall for the test, the PC is unprotected: do it only during the install and turn it back on straight away.

Safe checks you can perform

  • Free disk space
  • Uninstall and install again
  • Offline installer and wired connection
  • Temporary test without proxy or antivirus (personal PC only)

Leave these tasks to a qualified professional

  • Do not attempt this professional task: Check corporate network restrictions
  • Do not attempt this professional task: Install with the offline installer

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.

  1. Check corporate network restrictions

    What they doThe IT technician checks whether the network limits the install and whether the proxy and firewall allow the Microsoft 365 URLs and IP ranges.

    They must show youthe blocked destination.

    In writingthe rule changed.

  2. Install with the offline installer

    What they doThey deploy Office with the offline installer on the affected PC.

    They must show youthe installed version.

    In writingthe method used and whether the code went away.

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.

  1. Free disk space

    No special tools

    Who:
    you.
    How:
    on Windows 10 or 11, follow Microsoft's guide to free up drive space and install again.
    Result that matters:
    whether the install finishes with more free space.
    If it finishes:
    space was short.
    If nothing changes:
    uninstall and reinstall, then test the network.
    Evidence to keep:
    free space before and after.

    Evidence: Error code 0-1011, 30088-1015, or 30183-1011 when installing Office

  2. Uninstall and install again

    No special tools

    Who:
    you.
    How:
    run Microsoft's uninstall troubleshooter, restart when prompted and install again from your account.
    Result that matters:
    whether the fresh install finishes without the code.
    If it finishes:
    leftovers from an earlier attempt were in the way.
    If it repeats:
    use the offline installer.
    Evidence to keep:
    code and time of each attempt.

    Evidence: Error code 0-1011, 30088-1015, or 30183-1011 when installing Office

  3. Offline installer and wired connection

    No special tools

    Who:
    you.
    How:
    download the Office offline installer for your version. If you can, connect by cable or try another network, as Microsoft suggests.
    Result that matters:
    whether the install finishes this way.
    If it finishes:
    the online download or the network was the problem.
    If it also fails:
    move on to the proxy and antivirus test or to IT support.
    Evidence to keep:
    network used and result.

    Evidence: Error code 0-1011, 30088-1015, or 30183-1011 when installing Office

  4. Temporary test without proxy or antivirus (personal PC only)

    No special tools

    Who:
    you, only on a personal PC; on a work PC, IT support.
    How:
    Microsoft documents as a test turning off the proxy in Settings, Network & Internet, Proxy, and temporarily turning off antivirus or firewall. Install, then turn them back on as soon as it finishes.
    Result that matters:
    whether the install only finishes without them.
    If it finishes:
    the proxy or antivirus was blocking the download; turn them back on and contact their maker.
    If not:
    turn them back on at once; they were not the cause.
    Evidence to keep:
    what you turned off, for how long and when you turned it back on.

    Turn antivirus and firewall back on right after the test. On devices your organisation manages, do not do this: IT support decides.

    Evidence: Error code 0-1011, 30088-1015, or 30183-1011 when installing Office

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
Software and digital services
Brand
Microsoft 365
Product type
Office suites

Known code variants

  • 0-1011
  • 30088-1015 Office
  • 30183-1011
  • código de error 0-1011
  • error 30088-1015

What it means

Microsoft says 0-1011, 30088-1015 and 30183-1011 can appear if there is a network connection problem or the drive is running out of space. It suggests freeing space first and then, in order: uninstall and reinstall, use the offline installer, temporarily turn off the proxy, antivirus or firewall, use a wired connection and install from another network. The code does not tell network and disk apart.

Warnings and stop conditions

  • Mediumsource verified

    If you turn off antivirus or firewall for the test, the PC is unprotected: do it only during the install and turn it back on straight away.

    Evidence: Error code 0-1011, 30088-1015, or 30183-1011 when installing Office

Symptoms and causes

Probable causes · in order

  • Low free disk spacePossible

    Confirmed if freeing space lets the install finish.

    Evidence: Error code 0-1011, 30088-1015, or 30183-1011 when installing Office

  • Unstable or restricted connectionPossible

    Weak Wi-Fi or a work or school network with limits. A cable or another network fixes it.

    Evidence: Error code 0-1011, 30088-1015, or 30183-1011 when installing Office

  • Proxy or security software blocking the downloadPossible

    The offline installer finishes, or the temporary test without proxy or antivirus works.

    Evidence: Error code 0-1011, 30088-1015, or 30183-1011 when installing Office

Virtual technician

Does 30088-1015 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.

Start diagnosis

Sources and technical references

  1. 1

    Error code 0-1011, 30088-1015, or 30183-1011 when installing Office

    Microsoft · 2026 · official_doc

  2. 2

    Microsoft 365 URLs and IP address ranges

    Microsoft · 2026 · official_doc

Sources: Error code 0-1011, 30088-1015, or 30183-1011 when installing Office · Microsoft 365 URLs and IP address rangesreviewed 2026-10-03 · verified

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