diff --git a/windows/windows_system_info.ksy b/windows/windows_system_info.ksy
new file mode 100644
index 000000000..bda154044
--- /dev/null
+++ b/windows/windows_system_info.ksy
@@ -0,0 +1,52 @@
+meta:
+  id: windows_system_info
+  title: Microsoft Windows SYSTEM_INFO structure
+  license: Unlicese
+  endian: le
+  imports:
+    - /windows/windows_processor_architecture
+    - /windows/windows_processor_type
+    - /windows/windows_processor_revision
+doc-ref:
+  - https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/ns-sysinfoapi-system_info
+  - https://learn.microsoft.com/en-us/previous-versions/ms942639(v=msdn.10)
+  - https://learn.microsoft.com/en-us/windows/win32/api/minidumpapiset/ns-minidumpapiset-minidump_system_info
+seq:
+  - id: oem_id
+    size: 4
+    type: windows_processor_architecture
+  - id: page_size
+    -orig-id: dwPageSize
+    type: u4
+  - id: min_app_address
+    -orig-id: lpMinimumApplicationAddress
+    type: u8
+  - id: max_app_address
+    -orig-id: lpMaximumApplicationAddress
+    type: u8
+  - id: cpu_mask
+    -orig-id: dwActiveProcessorMask
+    type: u8
+  - id: cpu_count
+    -orig-id: dwNumberOfProcessors
+    type: u4
+  - id: processor_type
+    -orig-id: dwProcessorType
+    type: windows_processor_type
+  - id: allocation_granularity
+    -orig-id: dwAllocationGranularity
+    type: u4
+  - id: processor_level
+    -orig-id: wProcessorLevel
+    type: u2
+    doc: |
+      Impl-defined processor level.
+      Usually one-digit number. For example
+      1 - PPC 601
+      5 - i586
+      4 - MIPS R4000
+      General rule of thumb - larger the digit - better.
+  - id: processor_revision
+    -orig-id: wProcessorRevision
+    size: 2
+    type: windows_processor_revision(oem_id, processor_level)