Closing other installers; How??

[Richard DK]

When trying to install LR5.7 on creative cloud I get the following Message ; " another installer is currently running which must be closed before installing this product. Please close other installers. (error code 81)"

My question is how do I do this?  That is how do I find and close these other installers?

LRNav

[Mylenium]

Terminate the respective processes.

Working with your Operating System’s Tools | Mylenium's Error Code Database

Mylenium