User.zip is being used by another process

Hi all,

I am having a problem refreshing one of my reports.

The refreshing process stops half way through and the following error is displayed:

Feedback Type:
Frown (Error)

Error Message:
Error: The process cannot access the file 'C:\Users\xxxx\Microsoft\Power BI Desktop Store App\temp.User.zip' because it is being used by another process.
File 'User.zip' snapshot:
    FullName: 'C:\Users\xxxx\Microsoft\Power BI Desktop Store App\User.zip'
    IsReadonly: False
    IsHidden: False
File 'temp.User.zip' snapshot:
    FullName: 'C:\Users\xxxx\Microsoft\Power BI Desktop Store App\temp.User.zip'
    IsReadonly: False
    IsHidden: False

I've deleted and reinstalled powerBi desktop, I've rebooted the computer, I've ensured the user.zip file properties are OK. I've checked the process explorer and can't find any processes using the same file.

It all started when I changed my password (I am running a corporate machine and I am forced to do so), however, I had changed my password before with no problems. Furthermore, when I initially changed my password this error was intermittent, so I was able to refresh after a couple of attempts. However, I've been unable to do so for 5 days. This problem only occurs when one of the connectors is a Sharepoint list, but all credentials have been verified and valid.

I am running the machine with admin priviliges and antivirus and malware detection software have not changed for months.

The stack trace is massive (over 6000 words), hence why I am not posting it here.

Any ideas? I am running out of options!