Fix Acrobat “A running instance has caused an error”
Troubleshoot Acrobat “A running instance has caused an error” by following the official decision path while preserving user data.
A running instance of Acrobat has caused an error
Search 60 English guides by product, symptom or error code. Each guide includes instructions, checks and official sources.
60 guides
Troubleshoot Acrobat “A running instance has caused an error” by following the official decision path while preserving user data.
A running instance of Acrobat has caused an error
Troubleshoot Firefox “already running” or profile-in-use errors by following the official decision path while preserving user data.
Firefox is already running but is not responding · parent.lock
Identify the source of Chrome “Managed by your organization” by following the official decision path while preserving user data.
chrome://policy · chrome://management
Troubleshoot OneDrive “Can’t open file” or “Make sure OneDrive is running” by following the official decision path while preserving user data.
Troubleshoot OneDrive error 0x8007016a by following the official decision path while preserving user data.
0x8007016a
Troubleshoot “Cannot start Microsoft Outlook” with resetnavpane by following the official decision path while preserving user data.
Cannot start Microsoft Outlook · Outlook.exe /resetnavpane
Separate PDF damage from Acrobat installation damage by following the official decision path while preserving user data.
Use VS Code Extension Bisect to isolate freezes or abnormal behavior by following the official decision path while preserving user data.
Resolve and restore VS Code Settings Sync conflicts by following the official decision path while preserving user data.
Troubleshoot GitHub Desktop Authentication failed or Bad credentials by following the official decision path while preserving user data.
Bad credentials · empty token · Repository not found
Safely resolve a merge conflict in GitHub Desktop by following the official decision path while preserving user data.
Troubleshoot Zoom when others cannot hear you or you cannot hear them by following the official decision path while preserving user data.
Troubleshoot a missing or frozen camera in a Zoom meeting by following the official decision path while preserving user data.
Troubleshoot Discord No Route or RTC Connecting voice errors by following the official decision path while preserving user data.
No Route · RTC Connecting · ICE Checking
Troubleshoot a Discord microphone that is not detected by following the official decision path while preserving user data.
Troubleshoot a black or blank OBS Game Capture source by following the official decision path while preserving user data.
Troubleshoot OBS streaming dropped frames and disconnects by following the official decision path while preserving user data.
Repair only the outgoing SMTP path without changing incoming settings or deleting local mail.
SMTP
Repair Thunderbird’s profile location and default selection without deleting mail data.
thunderbird -P
Recreate only the search database to fix missing or slow results while preserving messages.
global-messages-db.sqlite
Record 173, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
173
Record 174, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
174
Record 175, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
175
Record 176, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
176
Record 183, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
183
Record 193, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
193
Record 202, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
202
Record 205, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
205
Record Manual install, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
Manual install
Record Clean installation, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
Clean installation
Record OEM warning, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
OEM warning
Record DSA install failure, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
DSA install failure
Record Cloud conflict, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
Cloud conflict
Record Unable to sync, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
Unable to sync
Record Host not found, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
Host not found
Record Black screen, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
Black screen
Record LS-0013, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
LS-0013
Record IS-0005, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
IS-0005
Record SU-PQR1603, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
SU-PQR1603
Record MD-0011-1037, verify the affected product and environment, correct the confirmed prerequisite, and retry once under the same conditions.
MD-0011-1037
WSL 2 error 0x80370102 prevents a distribution from starting. CPU virtualization in UEFI/BIOS, Virtual Machine Platform, or nested virtualization may be disabled. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
0x80370102
Restore the WSL optional component when error 0x8007019e appears. The Windows Subsystem for Linux feature may be disabled, or Windows may still need the restart requested after enabling it. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
0x8007019e
WSL alone cannot resolve names while a VPN is connected. VPN NRPT rules, enterprise firewall policy, or an older NAT DNS proxy configuration may conflict with WSL DNS requests. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
DNS
Hyper-V is missing from Windows Features or cannot be enabled. The PC may run Home edition, lack a SLAT-capable CPU, have firmware virtualization disabled, or have hypervisor launch disabled in boot configuration. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
Hyper-V
WSL 2 or Hyper-V cannot run inside a Hyper-V virtual machine. The host may not expose CPU virtualization extensions to the guest, or the setting may be attempted while the VM is running. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
0x80370102
Windows Sandbox is missing or cannot start. The PC may run Home edition, have virtualization disabled, lack memory or disk space, or have Containers-DisposableClientVM disabled. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
0x80070002
Disable networking and clipboard sharing in Windows Sandbox. Windows Sandbox enables networking and clipboard sharing by default, creating unnecessary paths between untrusted code and other resources. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
WSB
An SMB share repeatedly asks for credentials or returns access denied. Saved credentials, an existing SMB session, or a mismatched username format may conflict. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
0x80070035
Shared computers do not appear under Network in File Explorer. The network profile may be Public, network discovery may be disabled, or Function Discovery services may be stopped. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
SMB
A mapped network drive cannot reconnect after sign-in. Drive reconnection may run before Wi-Fi or VPN is ready, saved credentials may be stale, or the share name may have changed. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
0x80070043
Remote Desktop NLA rejects credentials. The destination account may lack permission, saved credentials may be stale, clocks may differ, or the domain/local username format may be wrong. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
NLA
Remote Desktop is not listening on TCP port 3389. Remote Desktop may be disabled, TermService stopped, built-in inbound rules disabled, or an upstream network may block traffic. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
0x204
Windows Hello PIN is unavailable or must be reset. TPM state, account authentication, organization policy, or the PIN container may be inconsistent. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
0x80090016
Storage Spaces reports a warning or degraded state. A disconnected or failed pool drive, insufficient free capacity, or an unfinished repair job may have removed redundancy. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
Degraded
A print job remains stuck on Deleting. An application or driver may hold a spool file, preventing Print Spooler from processing the queue. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
Spooler
USB devices repeatedly disconnect after idle or sleep. USB hub power management, selective suspend, cable or power limitations, or a device driver may be involved. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
Code 43
Hibernate is missing from the power menu. Hibernation may be disabled, free space may be insufficient for hiberfil.sys, or firmware/drivers may restrict available sleep states. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
powercfg
Adding a Windows optional feature fails because source files are missing. The component store may lack the payload and cannot reach Windows Update, WSUS, or the specified repair source. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
0x800f081f
Resolve Windows Installer error 1618: another installation is running. Windows Update, another setup, or a pending-restart msiexec transaction may already be running. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
1618
Windows Installer error 1601: service cannot be accessed. Windows Installer may be disabled or damaged, Windows may be in Safe Mode, or installer registration may have a problem. Record the current state before changing it, use only the supported Windows path described below, and verify the same operation again after any required restart.
1601
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