Microsoft last week released a PowerShell script which lets you check if your PC is vulnerable to Meltdown or Spectre, but now Ashampoo has made a free tool available which makes checking for the problem as easy as clicking a button.
All you need to do is download the Ashampoo Spectre Meltdown CPU Checker from here, and run it. Click the Start security check button, and it will run a scan of your system and present you with its findings for both Spectre and Meltdown. If your system is vulnerable to either, or both, clicking the 'What should I do?' link will take you back to the software download page where Ashampoo provides some useful tips for overcoming the issue. These include: