Microsoft released a Windows 7 update KB4480970 which caused issues. The primary issue that we came across was that windows 10 machines were no longer able to access the Windows 7 shared files or computer anymore. It would say something like “Invalid Handle”. Microsoft has released a fix for this, but you have to go and manually download the update at this point in time. The fix is KB4487345, which can be retrieved from the Microsoft Update Catalog.