Microsoft are improving the keyboard and input methods with Windows 10. Let's hope they release a modern updated character map with keyboard shortcut [Windows] and [ c ] in the next build of Windows 10.
Clipboard – Windows 10 Version 1809
Microsoft have created a Windows 10 Clipboard which allows you to Copy and Paste multiple items.
Press [Windows] and [ v ] to open the Windows Clipboard. This will allow you to paste not only the last text you have copied but all text before hand.
If it doesn't work for you. First check you have Windows 10 Version 1809. To do this right click the start button and select System:
Under Windows Specification, check Windows Specification to see you have Windows 10 Version 1809. If you have Windows 10 Version 1803, then note Windows 10 Version 1809 has been released and revoked because a minority of users lost files during an upgrade install. It will likely be updated to fix to this bug and re-released soon. See Windows OEM FAQs and Downloads for more information.
If you have Windows 10 Version 1809, then to the bottom left select Clipboard:
Ensure Clipboard History is Enabled:
Emoji Panel – Windows 10 Version 1803
Press [Windows] and [ . ]
Feedback – Implement a New Character Map with Shortcut Symbol Windows and [ c ]
Please up vote my Windows Feedback for this so it is brought to Microsoft's attention. To do this press [Windows] and [ f ] to open the Windows Feedback App and sign into the feedback app, if you aren't already signed into a Microsoft Account. Then select the Feedback Hub:
Search for character map and upvote please. Leave an optional comment if you've got additional ideas: