HiLab_Investigator, Assuming you are able to access Reader's menu options, could you please try checking update for Reader and see if that works: 1Correct answer. Bilal Ansari • Adobe Employee , Sep 21, 2021. Update: Microsoft confirmed that this is a known issue for the latest security updates, KB5005565 1 Close Background Processes and Give Adobe a Fresh Start. Many processes continue to run in the background even after we close the program. It means . I'm using a tablet by BestBuy's "Unbranded" house brand. It came with Windows 8.1 and Adobe Reader Acrobat DC worked beautifully. Converting to Windows 10 caused immediate compatibility problems: Acrobat DC froze ("not responding") upon opening. Adobe's troubleshooting found a gerry-rigging by configuring DC to open in -- Primeamong the solutions was Option 1: 1. Open file explorer. 2. Click view on the top of the file explorer. 3. Select preview pane option and see if it helps. And Option 2: Open the reader, Updateyour printer’s driver. Open the Device Manager. Locate your printer under Devices and printers. Right-click on in and go to Update Drive. If you can’t print your PDF document, perhaps the issue is driver-related. So checking if your printer’s driver is updated couldn’t do any harm. OpenAdobe Reader, click Edit, Preferences. Under “General”, enable the option Enable PDF thumbnail previews in Windows Explorer. Note: If you’ve chosen to disable PDF thumbnails, existing PDF files may still show thumbnail preview from the cache. The thumbnail cache needs to cleared using Disk Cleanup. Therecould be compatibility issues between your PDF Reader and device that causes the program to not work properly. For Instance, in Adobe Acrobat, you can set the compatibility mode Whyisn't Adobe Reader working on Windows 10? When Adobe Reader isn't working with Windows 10, admins can take a few troubleshooting steps to rectify Fix1: Run Adobe Reader in Compatibility Mode and as Administrator. Fix 2: Disable the Protected Mode. Fix 3: Repair and Install the Latest Parch. Fix 4: Reinstall Mdc2PI.