Hi,
Based on your description, after June 2015 windows updates the paste option didnt work in Office. And you also said it works fine in Excel and Notepad, it seemed that this issue not appeared in whole Office. This issue is strange, we couldnt determine
if this issue is caused by these updates.
First please try to repair Office and check if it works fine now.
- Click Start > Control Panel.
- Click Programs > Programs and Features.
- Click the Office application you want to repair, and then click Change.
- Click Repair > Continue.
Then if this issue still exists, please check the June 2015 updates in your computer.
The June 2015 updates contain these KB: KB 3062157, KB 3063858, KB 3062577, KB 3057839, KB 3059317, KB 3064949, KB 3033890 and KB 3058515.
Please refer to this link:
https://technet.microsoft.com/en-us/security/bulletin/dn602597.aspx?f=255&MSPPError=-2147217396
Please remove these KB one by one, if the issue is solved after removing one of these KB please let me know and provide which KB occur this issue. For fixing this issue is caused by Windows updates, you need to wait for MS to fix it.
Im glad to help and follow up your reply.
Hope its helpful.
Regards,
George Zhao
TechNet Community Support