1. Remove or Disable Unused Hardware Devices
- Open Device Manager (Win + X → Device Manager)
- Identify legacy, duplicate, or unused hardware entries
- Right-click → Disable device or Uninstall device
- Reboot and check if the BSOD recurs
- This reduces demand on system mapping registers
2. Update Device Drivers and Chipset Drivers
- Visit your PC or motherboard manufacturer’s website
- Download the latest chipset, storage, and system device drivers
- In Device Manager, right-click devices → Update Driver
- Avoid using third-party driver tools; get drivers from official sources
3. Update BIOS or UEFI Firmware
- Reboot and enter BIOS/UEFI (usually by pressing F2, Del, or Esc)
- Check the current BIOS version and compare it with the latest version on the manufacturer’s support site
- Follow the official procedure to apply BIOS updates carefully
- Firmware updates often fix resource allocation and hardware reporting bugs
4. Adjust VM or Emulation Settings (if using Virtual Machines)
If you encounter this error in a virtualised environment:
- Reconfigure the VM to reduce the number of virtual devices
- Switch from IDE to SATA or NVMe for virtual storage if possible
- Ensure integration tools or guest additions are installed and up to date
5. Run System File Checker and DISM
- Open Command Prompt as Administrator
- Run:
sfc /scannow
- Then run:
DISM /Online /Cleanup-Image /RestoreHealth
- These tools help repair OS components responsible for hardware interaction
6. Perform a Clean Boot to Rule Out Conflicts
- Type msconfig in the Run dialog (Win + R)
- Go to Services tab → Check “Hide all Microsoft services” → Click Disable all
- In Startup tab → Open Task Manager → Disable all startup apps
- Restart your system and check for the BSOD
7. Perform System Restore
- Open Control Panel → Recovery → Open System Restore
- Select a restore point created before the issue began
- Follow the on-screen instructions to restore system stability
Final Thoughts
The 0x00000045 INSUFFICIENT_SYSTEM_MAP_REGS BSOD points to a shortage of critical memory mapping structures used by hardware drivers.
To fix it:
- Disable unused hardware devices,
- Update chipset and system drivers,
- And update your BIOS or firmware to improve resource allocation.
If issues continue:
- Run SFC and DISM tools,
- Perform a clean boot,
- Or use System Restore to revert to a more stable state.
- Resolving this error ensures better hardware-to-OS communication and prevents further crashes tied to system resource exhaustion.