Confirmed facts first
The result states what Windows has actually reported before discussing possible causes.
Windows Error & PC Diagnostic Tools
Diagnose a Windows error
Paste what Windows actually showed. You get the confirmed facts, one safe check, and — after you record what happened — one clear next move: stop, repeat once, add one fact, or escalate with a ready Evidence Pack.
Real cases
Resume a saved session — paste a Resume Capsule
The capsule is validated and restored only in this browser. An invalid capsule changes nothing.
What the result contains
Evidence before repair
One safe check at a time
The first action is read-only or reversible and includes the expected result, how to verify it, and the rollback.
A recorded decision, not a repair chain
After the check you record what happened. Every session ends in one of four moves: stop and monitor, repeat the same check once, record one named missing fact, or escalate with a support-ready Evidence Pack.
Deliberately excluded: driver updaters, registry cleaners, dump uploads, and uncontrolled AI repair commands. Read the risk policy and review method.
Reviewed routes
Go straight to a focused route
Diagnostic routes
Error CheckerRecognize a code, exact message, driver filename, Stop Code, or command result and route it to the right diagnostic family.
UpdateSeparate download, install, restart, servicing, space, connectivity, and upgrade rollback evidence.
DeviceInterpret Device Manager status only after identifying the affected device category.
BSODIdentify the confirmed bug-check family, capture recurrence context, and collect usable crash evidence without guessing a root cause.
Command OutputParse the final SFC or DISM status locally and show the next evidence checkpoint before any administrator repair step.
Driver filesIdentify what a named .sys file can establish—and what it cannot establish—before changing drivers or security software.
Network & proxyDistinguish browser-only, proxy, VPN, DNS, and managed-network evidence without defaulting to destructive network resets.
Windows SandboxCheck edition, Windows feature state, virtualization, hypervisor, and policy context before changing configuration.
Evidence readers
Event ViewerEvidence readerPaste one time-matched Event Viewer record as rendered text or XML and extract the provider, Event ID, time, level, faulting fields, and diagnostic tokens without uploading the event.
Update / CBS logEvidence readerPaste a short WindowsUpdate.log, CBS.log, DISM, or servicing excerpt and extract timestamps, components, KBs, packages, error codes, and repeated error clusters without uploading the log.
System informationEvidence readerPaste a bounded msinfo32 or DxDiag text report and extract the Windows build, system model, firmware mode, memory, DirectX, display-driver, and explicitly reported problem-device facts without uploading the report.
Driver identityEvidence readerPaste bounded driverquery or PnPUtil enumeration text and extract driver, package, provider, class, version, signer, state, path, and device-relation facts without recommending a download or naming a culprit.
Known issuesEvidence readerEnter a Windows version/build, installed KB, and exact symptom to compare them with a bounded, dated Microsoft Release Health snapshot without claiming that a matching record proves this device is affected.