Problem with the last 2 updates installing

Having problems installing the last 2 updates 7.25.0 or 7.26.0

Hope this is right forum to ask this question. Been using Calibre for years with Windows 10 but for both of these updates I keep getting the following error message stopping the install

Calibre 64 bit setup

Another installation is in progress. You must complete that installation before continuing with this one


I have not installed any software for ages, and other updates to software have been fine. Have googled the error message and looked in Task Manager but can not get this resolved

Can anyone help or redirect this to a more suitable forum