Enterprise targeted data collection...

Hi everyone, what tools are commonly utilised by Enterprise to target and collect a paticular staff members data? By data i mean emails, local documents, files and folders, deleted items, downloads. Key word content sweeping, login / logoff details, credentials and passwords. I am the business owner but im being targeted by my business partner and i currently have a litigation case against him before the supreme court. Besides our company he has an IT managed services company and runs my businesses infrastructure. We are using Office 365 Enterprise, domain server and exchange server. My laptop is logging non-stop and many of the logs are hidden and the ones that arent are enough to male me paranoid. I even feel like they have physically been in my machine via Screen Connect client or teamviewer perhaps. There seem to be more and more 'Machine Users' S-1-15-21 DDDAFDEKXTNKWLP type user. And my laptop will suddenly and violently start blinking on and off like a strobe light. Its not the screen or a connector and if i put on Aeroplane mode it stops. Ive run Malwarebites and shows nothing. All drivers and updates are up to date.... help please how can i prptect myself? What am i looking for to detect internal corporate spying locally? Visiual Studio; SQL Server; .NET framework, Power Shell are all running locally on my laptop also. Thanks Rob