Hi there, when trying to install an application, I get a pop up saying: 'Error 1500. Another installation is in progress. You must complete that installation before continuing this one.' On a separate occasion, AVG performs an auto update and basically says the same thing: 'Update has detected running installation. Complete that installation before starting update.' Not sure if that is relevant but, I installed Windows 10 several weeks ago and performed a virus check with AVG after the fact, which was successful in finding and securing two trojan horses. I have gone through all tasks and found nothing that is performing any sort of installation that I can see. Any help would be appreciated.