0x0000003F is a kernel/debugger stop code result. This is the result of a system which has performed too many I/O actions. This has resulted in fragmented system page table entries (PTE).
Code reference and safe checks
Read the exact screen and operation before selecting a repair. This page does not run commands or collect files, keys or logs.
What this value means
This is the result of a system which has performed too many I/O actions. This has resulted in fragmented system page table entries (PTE).
NO_MORE_SYSTEM_PTES identifies a stop-code family. The four bug-check parameters and dump, if available, help distinguish the actual failure path.
| Code | 0x0000003F |
|---|---|
| Short hex form | 0x3F |
| Symbol | NO_MORE_SYSTEM_PTES |
| Windows family | Blue screen and stop codes |
| Source level | Microsoft bug-check page |
Microsoft’s technical cause notes add: In almost all cases, the system is not actually out of PTEs. Rather, a driver has requested a large block of memory, but there is no contiguous block of sufficient size to satisfy this request.
The linked debugger page also describes its parameters: In almost all cases, the system is not actually out of PTEs. Rather, a driver has requested a large block of memory, but there is no contiguous block of sufficient size to satisfy this request.
Safe next steps
- For 0x0000003F (NO_MORE_SYSTEM_PTES), record the exact stop code and parameters. Microsoft’s debugger reference may describe a kernel condition rather than a consumer fix.
- If crashes repeat, inspect the dump locally with official WinDbg and compare its parameters with this code’s Microsoft page.
- Do not enable Driver Verifier or change firmware as a generic first step; ask qualified support if the PC cannot start.
After one step, repeat the original operation and record whether this same code returns. A different code needs a fresh interpretation.
What this code cannot prove
The source establishes the identifier and reference meaning. It does not establish the cause on your specific PC.
If Windows no longer starts or the issue repeats with hardware warnings, protect files and use manufacturer or qualified support.
Official reference and verification
Source type: Microsoft bug-check page. Checked against the source set on Nov 2, 2026.
The reference gives the meaning of this identifier. It does not inspect your PC or guarantee that one repair will work.