Fix 0x0000004D NO_PAGES_AVAILABLE in Windows

Quick Answer

NO_PAGES_AVAILABLE, bug check 0x0000004D, means Windows has no free memory pages available to continue operating. Microsoft documents causes involving blocked page writers, stalled storage requests, starvation of memory-management threads, and insufficient pool memory for storage operations. Microsoft Learn

Preserve the crash dump, review recent driver changes, and investigate how memory pages stopped becoming available. Adding RAM or enlarging the page file is not a universal repair.

What Causes This Error?

Microsoft identifies these possible failure paths:

These clues guide investigation; they do not independently identify the responsible component. Microsoft Learn

Bug-check parameters

Preserve all four values from the dump. Microsoft does not give universal numeric thresholds for “large” or “small” here. Microsoft Learn

Before You Begin

1. Back up important files while Windows remains accessible.
2. Record the crash time and workload.
3. Note recent storage, driver, application, and system changes.
4. Preserve existing crash dumps.
5. Have administrator access available for maintenance.

Record each change and its result. Avoid changing several drivers or memory settings simultaneously.

How to Troubleshoot 0x0000004D

1. Review recent changes and the affected workload

Determine whether failures began after a driver update or during a repeatable workload. Record whether the problem develops immediately or after hours of operation.

Microsoft’s general stop-error guidance recommends reviewing recent changes and investigating components identified by crash evidence. learn.microsoft.com

Use the timeline to prioritize investigation. For example, a recent storage-driver change is worth examining when the dump also points toward stalled storage activity.

2. Check memory demand and page-file configuration

While Windows is running, open Task Manager → Performance → Memory and record the Committed figures during the affected workload.

Committed memory approaching its limit is useful evidence of capacity pressure. Page files support the system commit limit and can support crash-dump collection. Their requirements depend on workload and dump needs. Microsoft Learn

Check whether a page file was recently disabled or restricted and whether its volume has room for growth. Treat these as configuration checks; a larger page file cannot establish that the underlying fault has been corrected.

3. Roll back or update an implicated driver

If failures began immediately after a relevant device driver update:

1. Open Device Manager.
2. Locate the device and open Properties.
3. Select Driver → Roll Back Driver, if available.
4. Follow the prompts and restart.

Administrator privileges are required. If rollback is unavailable or unsuitable, obtain a compatible package through Windows Update or the manufacturer’s official support site. support.microsoft.com

For drivers bundled with an application, use the vendor’s supported maintenance process. Keep recovery instructions or the previous installer available.

4. Use Safe Mode if startup is unstable

From Windows Recovery Environment:

1. Select Troubleshoot → Advanced options → Startup Settings → Restart.
2. Press 4 or F4 for Safe Mode.
3. Perform the relevant rollback if available.

An encrypted device may require its BitLocker recovery key. Safe Mode uses limited drivers and services; stability there helps narrow the investigation without proving the cause. Restart normally afterward. support.microsoft.com

Advanced Troubleshooting with WinDbg

1. Preserve a suitable dump

Default locations include:

If necessary, configure Automatic memory dump under Advanced system settings → Advanced → Startup and Recovery → Settings, then restart. A dump is available only if Windows successfully writes it. learn.microsoft.com

Small dumps contain limited context and may not reveal the underlying cause. Memory-manager and pool investigations may require a more complete dump. learn.microsoft.com

2. Start with the bug-check analysis

Open the dump in WinDbg with appropriate symbols configured, then run:

!analyze -v

Record the arguments, stack, and module information before investigating memory statistics. learn.microsoft.com

3. Examine memory statistics and page-writing activity

Run:

!vm 3

This displays system memory statistics and memory-management thread stacks while omitting per-process statistics.

For page-file write information, run:

!vm 8

The 0x8 flag includes the page-file write log. Use the available output to investigate writing activity and possible stalls. Missing information should be recorded as a dump limitation. Microsoft Learn

4. Investigate nonpaged-pool consumption

Run:

!poolused 2

This summarizes pool allocations by tag and sorts the results by nonpaged-memory use. The output includes outstanding allocation counts and bytes consumed. Microsoft Learn

A large pool tag is a lead, not proof of a leak. Identify the owning component and evaluate whether its allocations are expected for the workload. Growth over time is more informative than size alone.

5. Escalate inconclusive cases

Provide the debugger output and original dump to the relevant vendor or support engineer. Further investigation may require thread scheduling analysis or live kernel debugging.

Avoid removing a component solely because it appears in the stack or has the largest allocation total.

How to Verify the Fix

1. Restart Windows normally.
2. Confirm the intended driver or configuration change.
3. Repeat the affected workload using noncritical data.
4. Observe for at least the period in which the problem previously developed.
5. Compare memory behavior and preserve any new dump.

If another problem appears after a change, restore the previous supported configuration using your change log.

Frequently Asked Questions

Does this mean I need more RAM?

Not necessarily. Determine whether the workload exceeds capacity or whether a component prevents memory from being reclaimed before buying hardware.

Will increasing the page file fix it?

It may address an inadequate commit limit, but it is not a guaranteed repair for this stop code. Page-file sizing should follow measured workload and dump requirements. Microsoft Learn

Why investigate storage for a memory error?

Writing modified memory pages can involve the storage stack. A failure in that path can affect the availability of reusable pages.

Does the largest pool tag identify a leaking driver?

No. Large allocations can be legitimate. Investigate the tag’s owner, workload, and allocation behavior before concluding that it leaks.

What should I send to technical support?

Provide the dump, Windows build, hardware details, driver versions, workload description, recent changes, and output from !analyze -v, !vm, and relevant pool analysis.

Conclusion

For 0x0000004D, investigate why Windows could no longer make memory pages available. Use crash evidence to distinguish capacity pressure from blocked writing, storage problems, or excessive pool consumption, then verify a targeted correction.

Sources

• Microsoft Learn — Bug Check 0x4D: NO_PAGES_AVAILABLE
• Microsoft Learn — !vm debugger extension
• Microsoft Learn — !poolused debugger extension
• Microsoft Learn — Introduction to page files
• Microsoft Learn — Advanced troubleshooting for stop code errors
• Microsoft Support — Update drivers through Device Manager in Windows
• Microsoft Support — Windows startup settings
• Microsoft Learn — Small Memory Dump