Computer suddenly can't copy paste file how to solve

When I used copy and paste many times, I found that my computer could not be copied and pasted, as follows:

1, can not copy paste Web content.

2, can not copy paste Word,excel office software, such as the contents of the file.

3, can not copy paste file.

4, when I copy content prompts: "Cannot clear clipboard."

When I can't copy and paste, my work is almost impossible to carry on, it's Ballo me too! So I started frantically looking for answers:

First set of methods: I try to close all Office software and reopen the file.

Results: The pasted content still cannot be copied. ---declared a failure.

The second set of methods: Check the clipboard of office software such as Word,excel, clear all the contents of the Clipboard (previously I have encountered this, this method worked before).

Result: There is nothing in the Clipboard, so there is no clipboard content. The final result, of course, cannot be copied or pasted. ---declared a failure.

The third set of methods: Check whether the computer virus, and then enable anti-virus software, a full scan of the computer.

Results: No virus was found, another prompt "Cannot clear clipboard", so the paste file cannot be copied. ---declared a failure.

The fourth set of methods: Helpless method, flustered case, choose to restart the computer.

Result: The surprise---can be copied and pasted. ---'s done.

Conclusion: When the computer can not copy and paste, I suggest you give priority to plan one and two, if not successful, you can try scenario four, because the scheme three is time-consuming and not necessarily successful. This is the result of my many times practice, hope this information is helpful to everybody.