Desktop apps troubleshooting guides

Troubleshoot desktop application errors, profiles, connection settings and file problems using detailed steps and official documentation.

59 guides · Search and filter this category →

◫Mozilla FirefoxTroubleshooting guide

Firefox crashes or displays text and page elements incorrectly

Firefox crashes

Firefox Desktop (general Mozilla support procedure; no specific version)

Checked 2026.10.13Read guide ↗

◫Google ChromeTroubleshooting guide

Isolate GPU-related Chrome crashes, freezes, or startup failures

Chrome crashes

Chrome for computer (general Google support procedure; no specific version)

Checked 2026.10.13Read guide ↗

◫Classic Outlook for WindowsResolved

Outlook 2024/2021 LTSC crashes when opening email from Viva Engage and similar services

Classic Outlook crashes when opening email sent by Viva Engage, Viva Insights, Yammer, Power Automate, or similar services

Known crash examples: Outlook 2024 LTSC 16.0.17932.20700 and 2021 LTSC 16.0.14334.20440. Check installation against the Office update history: the May 12, 2026 builds are 17932.20776 for LTSC 2024 and 14334.20670 for LTSC 2021.Event 1000

Checked 2026.09.12Read guide ↗

◫Classic Outlook for WindowsTroubleshooting guide

Start Classic Outlook in safe mode to identify an add-in conflict

Outlook does not start, remains at Processing, or crashes while sending or receiving

Outlook for Microsoft 365 / Outlook 2024 / 2021 (Classic)

Checked 2026.10.13Read guide ↗

◫Classic Outlook for WindowsTroubleshooting guide

Isolate Classic Outlook connection problems by repairing or creating a profile

Mail connection, sending and receiving, or startup fails for one Outlook profile

Outlook for Microsoft 365 / Outlook 2024 / 2021 / 2019 / 2016 (features vary)

Checked 2026.10.13Read guide ↗

◫Microsoft Teams for WindowsTroubleshooting guide

Rebuild the cache when Microsoft Teams cannot reconnect

Teams remains at Reconnecting, or the screen does not update after sign-in

New Microsoft Teams for Windows

Checked 2026.10.13Read guide ↗

◫Microsoft OneDrive for WindowsTroubleshooting guide

Reset the app when OneDrive synchronization stops

Synchronization remains stopped for a long time, a sync error persists, or error 0x80070194 appears

OneDrive desktop sync app for Windows0x80070194

Checked 2026.10.13Read guide ↗

◫Mozilla Firefox DesktopTroubleshooting guide

Return profile settings to defaults with Firefox Refresh

Firefox problems continue after isolating extensions and settings

Firefox Desktop; available in Firefox 150 or later when using the new profile management

Checked 2026.10.13Read guide ↗

◫Google Chrome for computerTroubleshooting guide

Isolate Chrome “Aw, Snap! / Out of Memory” errors by testing load and extensions

A page crashes because memory is exhausted, or a tab cannot load

Chrome for Windows/macOS (general procedure)Aw, Snap!

Checked 2026.10.13Read guide ↗

◫Microsoft EdgeTroubleshooting guide

Repair Microsoft Edge when it does not open or closes immediately

No window opens when Edge is selected

Microsoft Edge for Windows 11 / Windows 10

Checked 2026.10.13Read guide ↗

◫Google ChromeTroubleshooting guide

Troubleshoot Chrome ERR_NAME_NOT_RESOLVED

The site cannot be reached

Chrome for computerERR_NAME_NOT_RESOLVED

Checked 2026.10.13Read guide ↗

◫Google ChromeTroubleshooting guide

Troubleshoot Chrome ERR_CONNECTION_RESET

The connection resets while loading

Chrome for computerERR_CONNECTION_RESET

Checked 2026.10.13Read guide ↗

◫Google ChromeTroubleshooting guide

Safely troubleshoot Chrome NET::ERR_CERT_DATE_INVALID

Chrome says the connection is not private

Chrome for computerNET::ERR_CERT_DATE_INVALID

Checked 2026.10.13Read guide ↗

◫Google ChromeTroubleshooting guide

Chrome download blocked? Review the warning and fix the cause

Chrome blocks a download or labels it dangerous

Chrome for computerDangerous download blocked

Checked 2026.10.13Read guide ↗

◫Mozilla FirefoxTroubleshooting guide

Firefox: Troubleshoot SEC_ERROR_UNKNOWN_ISSUER Safely

A certificate issuer is unknown

Firefox DesktopSEC_ERROR_UNKNOWN_ISSUER

Checked 2026.10.13Read guide ↗

◫Classic Outlook for WindowsTroubleshooting guide

Classic Outlook: Fix Offline Send and Receive Problems

It says I'm working offline

Outlook for Microsoft 365 / 2024 / 2021 / 2019 / 2016（classic）Working Offline

Checked 2026.10.13Read guide ↗

◫Classic Outlook for WindowsTroubleshooting guide

Classic Outlook: Fix Missing Search Results

No search results

Outlook for Microsoft 365 / 2024 / 2021 / 2019 / 2016（classic）Indexing Status

Checked 2026.10.13Read guide ↗

◫Microsoft Word for WindowsTroubleshooting guide

Word: Start in Office Safe Mode

Crashes on normal startup

Word for Microsoft 365 / 2024 / 2021 / 2019 / 2016winword /safe

Checked 2026.10.13Read guide ↗

◫Microsoft Excel for WindowsTroubleshooting guide

Excel: Start in Office Safe Mode

Stop at startup

Excel for Microsoft 365 / 2024 / 2021 / 2019 / 2016excel /safe

Checked 2026.10.13Read guide ↗

◫Microsoft Excel for WindowsTroubleshooting guide

Excel: Recover a Damaged Workbook with Open and Repair

Can't open due to corruption error

Excel for Microsoft 365 / 2024 / 2021 / 2019 / 2016Open and Repair

Checked 2026.10.13Read guide ↗

◫Microsoft 365 / Office for WindowsTroubleshooting guide

Office: Fix an “Unlicensed Product” Activation Error

License warning appears

Microsoft 365 Apps / Office 2024 / 2021 / 2019 / 2016Unlicensed Product

Checked 2026.10.13Read guide ↗

◫Microsoft OneDrive / SharePointTroubleshooting guide

OneDrive: Fix Invalid File Names and Long Paths

Name has sync error

OneDrive for Windows (for personal/work/school use)Invalid file name

Checked 2026.10.13Read guide ↗

◫Microsoft Teams for work or schoolTroubleshooting guide

Teams: Fix Camera and Microphone Access on Windows

No image appears

Teams desktop version / Teams on the web (Windows)

Checked 2026.10.13Read guide ↗

◫Microsoft StoreTroubleshooting guide

Microsoft Store: Fix App Download and Update Failures

The download or installation does not progress

Windows 11 / Windows 10wsreset.exe

Checked 2026.10.13Read guide ↗

◫Steam ClientTroubleshooting guide

Fix Steam's Failed to Start Game (Missing Executable) error

Launching a game reports a missing executable

Steam Client for Windows (no specific release)Failed to Start Game

Checked 2026.10.13Read guide ↗

◫Steam ClientTroubleshooting guide

Repair Steam crashes or missing content by verifying game files

The game crashes during play

Steam Client (Windows / macOS / Linux; no specific release)

Checked 2026.10.13Read guide ↗

◫Steam ClientTroubleshooting guide

Clear Steam's download cache when downloads or game startup stall

A game download will not start or finish

Steam Client (no specific release)

Checked 2026.10.13Read guide ↗

◫Epic Games LauncherTroubleshooting guide

Verify missing or damaged game files in Epic Games Launcher

The game cannot find required files or directories and will not launch

Epic Games Launcher for Windows / macOS (no specific release)LS-0014

Checked 2026.10.13Read guide ↗

◫Microsoft OneDriveTroubleshooting guide

OneDrive storage full and sync stopped: check cloud and local space

OneDrive reports that its storage is full

Personal and work or school OneDrive; Windows sync app and web

Checked 2026.10.13Read guide ↗

◫Google ChromeTroubleshooting guide

Chrome ERR_TOO_MANY_REDIRECTS: check cookies for the affected site

Chrome reports too many redirects

Google Chrome for desktop; a redirect error on a specific websiteERR_TOO_MANY_REDIRECTS

Checked 2026.10.13Read guide ↗

◫Mozilla FirefoxTroubleshooting guide

Firefox Server Not Found: compare browsers and check proxy settings

Firefox displays Server Not Found

Firefox for desktop on Windows, with another browser available for comparisonServer Not Found

Checked 2026.10.13Read guide ↗

◫Classic Outlook for WindowsTroubleshooting guide

Outlook email stuck in Outbox: move a large attachment message to Drafts

A message with a large attachment stays in Outbox

Classic Outlook for Windows (Microsoft 365 / Outlook 2024 / 2021) with the Send/Receive ribbon

Checked 2026.10.13Read guide ↗

◫Microsoft ExcelTroubleshooting guide

Excel file locked for editing: check the owner, location and app

Excel says the file is locked by you or another user

Excel for Microsoft 365 / Excel 2024 / 2021 / Excel for the web; opening a shared workbook

Checked 2026.10.13Read guide ↗

◫Adobe AcrobatTroubleshooting guide

A running instance of Acrobat has caused an error: fixes

Opening a PDF displays A running instance of Acrobat has caused an error

Acrobat on WindowsA running instance of Acrobat has caused an error

Checked 2026.10.13Read guide ↗

◫Mozilla FirefoxTroubleshooting guide

Fix Firefox “already running” or profile-in-use errors

Firefox says it is already running after exit

Firefox DesktopFirefox is already running but is not responding

Checked 2026.10.13Read guide ↗

◫Google ChromeTroubleshooting guide

Identify the source of Chrome “Managed by your organization”

A personal PC shows a managed notice

Chrome for Windows, macOS, and Linuxchrome://policy

Checked 2026.10.13Read guide ↗

◫Microsoft OneDriveTroubleshooting guide

Fix OneDrive “Can’t open file” or “Make sure OneDrive is running”

Only blue-cloud files fail to open

OneDrive for Windows

Checked 2026.10.13Read guide ↗

◫Microsoft OneDriveTroubleshooting guide

Fix OneDrive error 0x8007016a

0x8007016a appears on move, delete, or open

OneDrive for Windows0x8007016a

Checked 2026.10.13Read guide ↗

◫Classic Outlook for WindowsTroubleshooting guide

outlook.exe /resetnavpane: use it when Outlook will not open

Outlook window cannot open

Outlook for Microsoft 365/2024/2021Cannot start Microsoft Outlook

Checked 2026.10.13Read guide ↗

◫Adobe Acrobat / Acrobat ReaderTroubleshooting guide

Separate PDF damage from Acrobat installation damage

One PDF or every PDF fails to open

Current desktop releases on Windows

Checked 2026.10.13Read guide ↗

◫Visual Studio CodeTroubleshooting guide

Use VS Code Extension Bisect to isolate freezes or abnormal behavior

Typing or saving becomes unstable after adding extensions

VS Code desktop

Checked 2026.10.13Read guide ↗

◫Visual Studio CodeTroubleshooting guide

Resolve and restore VS Code Settings Sync conflicts

VS Code asks for Accept Local or Accept Remote

VS Code Stable and Insiders

Checked 2026.10.13Read guide ↗

◫GitHub DesktopTroubleshooting guide

Fix GitHub Desktop Authentication failed or Bad credentials

Push or clone authentication fails

GitHub Desktop for Windows and macOSBad credentials

Checked 2026.10.13Read guide ↗

◫GitHub DesktopTroubleshooting guide

Safely resolve a merge conflict in GitHub Desktop

GitHub Desktop lists merge conflicts

GitHub Desktop for Windows and macOS

Checked 2026.10.13Read guide ↗

◫Zoom WorkplaceTroubleshooting guide

Fix Zoom when others cannot hear you or you cannot hear them

The microphone meter does not move

Zoom desktop app for Windows and macOS

Checked 2026.10.13Read guide ↗

◫Zoom WorkplaceTroubleshooting guide

Fix a missing or frozen camera in a Zoom meeting

Zoom cannot detect the camera when starting video

Zoom desktop app for Windows and macOS

Checked 2026.10.13Read guide ↗

◫DiscordTroubleshooting guide

Fix Discord No Route or RTC Connecting voice errors

No Route, RTC Connecting, or ICE Checking never completes

Discord desktop and browser appsNo Route

Checked 2026.10.13Read guide ↗

◫DiscordTroubleshooting guide

Fix a Discord microphone that is not detected

The input sensitivity meter does not react

Discord desktop, browser, and mobile apps

Checked 2026.10.13Read guide ↗

◫OBS StudioTroubleshooting guide

Fix a black or blank OBS Game Capture source

Game audio is present but preview is black

OBS Studio on Windows

Checked 2026.10.13Read guide ↗

◫OBS StudioTroubleshooting guide

Fix OBS streaming dropped frames and disconnects

Dropped Frames increases and stream playback breaks up

OBS Studio on Windows, macOS, and Linux

Checked 2026.10.13Read guide ↗

◫Mozilla ThunderbirdTroubleshooting guide

Fix Thunderbird when receiving works but sending mail fails

Mail downloads, but sending fails

Thunderbird Desktop on Windows, macOS, and LinuxSMTP

Checked 2026.10.13Read guide ↗

◫Mozilla ThunderbirdTroubleshooting guide

Recover a missing or inaccessible Thunderbird profile

Thunderbird says the profile is missing or inaccessible

Thunderbird Desktop on Windows, macOS, and Linuxthunderbird -P

Checked 2026.10.13Read guide ↗

◫Mozilla ThunderbirdTroubleshooting guide

Rebuild Thunderbird’s global search index when results are blank or slow

Existing messages do not appear in global search

Thunderbird Desktopglobal-messages-db.sqlite

Checked 2026.10.13Read guide ↗

◫Rocket League / Epic Games LauncherTroubleshooting guide

Rocket League unable to verify files in Epic Games: what to do

Unable to verify Rocket League files in Epic Games Launcher or cannot find Verify

Rocket League installed through Epic Games Launcher on a Windows PC; Steam and console procedures differ.

Checked 2026.10.13Read guide ↗

◫Minecraft for Windows / Minecraft LauncherTroubleshooting guide

Minecraft GAME_MISSING: checks before reinstalling Bedrock

Minecraft Launcher displays Error Code: GAME_MISSING instead of opening the game

Minecraft Launcher cannot open Minecraft for Windows (Bedrock) on a Windows PC. Keep this separate from Java Edition mod or exit-code problems.GAME_MISSING

Checked 2026.10.13Read guide ↗

◫Adobe Acrobat / Acrobat ReaderTroubleshooting guide

Acrobat PDFs will not print, print blank, or show garbled text

A PDF looks readable on screen but prints blank

Acrobat / Acrobat Reader on Windows 11. These steps use the desktop app, not a browser's built-in PDF print dialog.

Checked 2026.09.12Read guide ↗

◫Adobe Acrobat / Acrobat ReaderTroubleshooting guide

Acrobat cannot save a PDF: access denied or permission errors

Saving a PDF reports access denied or insufficient permission

Acrobat / Acrobat Reader on Windows 11. Windows Security instructions apply when the relevant Microsoft Defender feature is in use.

Checked 2026.09.12Read guide ↗

◫Classic OutlookTroubleshooting guide

Outlook cannot preview PDF, Word, or Excel attachments

PDF, Word, or Excel attachments will not preview

Classic Outlook for Microsoft 365 / 2024 / 2021 on Windows 11. New Outlook uses different menus and preview behavior.

Checked 2026.09.12Read guide ↗

◫Rocket LeagueTroubleshooting guide

Rocket League cannot connect to Epic Online Services or servers

Rocket League cannot communicate with Epic Online Services

Rocket League for PC on Windows 11. Console time and network settings require that platform's official instructions.Error 71

Checked 2026.09.12Read guide ↗