Right-click on the .7z.001 file, select 7-Zip, and choose "Extract Here". The software will automatically combine both parts to extract the content.

Because this is a multi-part archive (part 2 of 2), you must have both files in the same folder to decompress it. General Steps to Open an OLI 7z Multi-Part Archive

Once extracted, look for the guide ( .pdf or similar file) within the extracted folder.

Are you looking to install a specific or just read a PDF guide ? Do you have the first part ( .7z.001 ) of the file?

If this guide is part of the OLI Systems training, you can find official documentation on their website. To help you better, could you please clarify: did you download this file from?

Use software like 7-Zip (recommended) to extract the files.