verify sha256 checksums for windows users.

README.md

@@ -289,29 +289,34 @@ python3 convert.py models/gpt4all-7B/gpt4all-lora-quantized.bin
 
 - The newer GPT4All-J model is not yet supported!
 
-### Obtaining and verifying the Facebook LLaMA original model and Stanford Alpaca model data
+### Obtaining the Facebook LLaMA original model and Stanford Alpaca model data
 
 - **Under no circumstances should IPFS, magnet links, or any other links to model downloads be shared anywhere in this repository, including in issues, discussions, or pull requests. They will be immediately deleted.**
 - The LLaMA models are officially distributed by Facebook and will **never** be provided through this repository.
 - Refer to [Facebook's LLaMA repository](https://github.com/facebookresearch/llama/pull/73/files) if you need to request access to the model data.
-- Please verify the [sha256 checksums](SHA256SUMS) of all downloaded model files to confirm that you have the correct model data files before creating an issue relating to your model files.
-- The following command will verify if you have all possible latest files in your self-installed `./models` subdirectory:
 
-  `sha256sum --ignore-missing -c SHA256SUMS` on Linux
+### Verifying the Facebook LLaMA original model and Stanford Alpaca model data
 
-  or
+Please verify the [sha256 checksums](SHA256SUMS) of all downloaded model files to confirm that you have the correct model data files before creating an issue relating to your model files. The following commands will verify if you have all possible latest files in your self-installed `./models` subdirectory:
 
-  `shasum -a 256 --ignore-missing -c SHA256SUMS` on macOS
+ - on Linux: `sha256sum --ignore-missing -c SHA256SUMS`
+ - on macOS: `shasum -a 256 --ignore-missing -c SHA256SUMS` 
+ - on windows there is a PowerShell script available which can perfom the verification, use the following steps to run it:
+    1. Open PowerShell
+    2. Change the directory to the script folder in your llama directory: `cd .\PathToLLamMa\scripts`
+    3. Launch the powershell script: `.\check_SHA256_windows.ps1`
 
-- If your issue is with model generation quality, then please at least scan the following links and papers to understand the limitations of LLaMA models. This is especially important when choosing an appropriate model size and appreciating both the significant and subtle differences between LLaMA models and ChatGPT:
+### LLaMA papers and background on large language models
+
+If you have issues with model generation quality, then please at least scan the following links and papers to understand the limitations of LLaMA models. This is especially important when choosing an appropriate model size and appreciating both the significant and subtle differences between LLaMA models and ChatGPT:
 - LLaMA:
-- [Introducing LLaMA: A foundational, 65-billion-parameter large language model](https://ai.facebook.com/blog/large-language-model-llama-meta-ai/)
-- [LLaMA: Open and Efficient Foundation Language Models](https://arxiv.org/abs/2302.13971)
+  - [Introducing LLaMA: A foundational, 65-billion-parameter large language model](https://ai.facebook.com/blog/large-language-model-llama-meta-ai/)
+  - [LLaMA: Open and Efficient Foundation Language Models](https://arxiv.org/abs/2302.13971)
 - GPT-3
-- [Language Models are Few-Shot Learners](https://arxiv.org/abs/2005.14165)
+  - [Language Models are Few-Shot Learners](https://arxiv.org/abs/2005.14165)
 - GPT-3.5 / InstructGPT / ChatGPT:
-- [Aligning language models to follow instructions](https://openai.com/research/instruction-following)
-- [Training language models to follow instructions with human feedback](https://arxiv.org/abs/2203.02155)
+  - [Aligning language models to follow instructions](https://openai.com/research/instruction-following)
+  - [Training language models to follow instructions with human feedback](https://arxiv.org/abs/2203.02155)
 
 ### Perplexity (measuring model quality)
 

scripts/check_SHA256_windows.ps1

@@ -0,0 +1,69 @@
+# Define the path to the llama directory (parent folder of script directory)
+$llamaPath = Split-Path -Path $pwd -Parent
+
+# Define the file with the list of hashes and filenames
+$hashListFile = Join-Path -Path $llamaPath -ChildPath "SHA256SUMS"
+
+# Check if the hash list file exists
+if (-not(Test-Path -Path $hashListFile)) {
+    Write-Error "Hash list file not found: $hashListFile"
+    exit 1
+}
+
+# Read the hash file content and split it into an array of lines
+$hashList = Get-Content -Path $hashListFile
+$hashLines = $hashList -split "`n"
+
+# Create an array to store the results
+$results = @()
+
+# Loop over each line in the hash list
+foreach ($line in $hashLines) {
+
+  # Split the line into hash and filename
+  $hash, $filename = $line -split "  "
+
+  # Get the full path of the file by joining the models path and the filename
+  $filePath = Join-Path -Path $llamaPath -ChildPath $filename
+
+  # Informing user of the progress of the integrity check
+  Write-Host "Verifying the checksum of $filePath"
+
+  # Check if the file exists
+  if (Test-Path -Path $filePath) {
+
+    # Calculate the SHA256 checksum of the file using certUtil
+    $fileHash = certUtil -hashfile $filePath SHA256 | Select-Object -Index 1
+
+    # Remove any spaces from the hash output
+    $fileHash = $fileHash -replace " ", ""
+
+    # Compare the file hash with the expected hash
+    if ($fileHash -eq $hash) {
+      $validChecksum = "V"
+      $fileMissing = ""
+    }
+    else {
+      $validChecksum = ""
+      $fileMissing = ""
+    }
+  }
+  else {
+    $validChecksum = ""
+    $fileMissing = "X"
+  }
+
+  # Add the results to the array
+  $results += [PSCustomObject]@{
+    "filename" = $filename
+    "valid checksum" = $validChecksum
+    "file missing" = $fileMissing
+  }
+}
+
+# Output the results as a table
+$results | Format-Table `
+  -Property @{Expression={$_.filename}; Label="filename"; Alignment="left"}, `
+            @{Expression={$_."valid checksum"}; Label="valid checksum"; Alignment="center"}, `
+            @{Expression={$_."file missing"}; Label="file missing"; Alignment="center"} `
+  -AutoSize