A JPG file is a single image file and a PDF file may have multiple pages. I don't understand why you want to convert multiple PDF files in to a single image file. But it is a normal process to convert multiple JPG images into a single PDF file. All you need is a PDF writer or a PDF printer driver.
The driver is not part of the OS. The PDF driver you need is in the Windows Registry. After adding and then modifying the Windows Registry, it is quite a simple process to convert your JPG to PDF: 1.) 2.) 3.) 4.) 5.) 6.) 7.) 8.) 9.) 10.) 11.) 12.) 13.) 14.) 15.) 16.) 17.) 18.) 19.) 20.) If you cannot find any of the above steps in the below instructions, or there are any errors, then Don't worry and try the steps above again. How to convert JPG files from JPG to PDF. Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Control Panel\Desktop\{5D5CAEE6-7B1C-4F9E-A908-1C928A2DB3D3}\0.{7839FFDF-DFF6-4645-9D7C-5C8B827C7F7A}] 2.) Open the Windows Registry Editor and navigate to the following key: [HKEY_CURRENT_USER\Control Panel\Desktop\{5D5CAEE6-7B1C-4F9E-A908-1C928A2DB3D3}\0.{7839FFDF-DFF6-4645-9D7C-5C8B827C7F7E}] Then right-click on it and select “New → Key” 3.) Click the “New” button and name the new key “PDF. Rtf” 4.) Click the “Name” button and then enter PDF RTF as a new registry key. 5.) Click the “Set” button and then double-click the “PDF. Rtf” registry key to open it. 6.) Select the PDF. Rtf profile as a preferred configuration. That is it. Done.