Not sure what you mean. This happened several times. Come back to my MAC and Parallels is creating/deleting snapshot. MAC is completely unusable, internet, apps etc. Then when its done, there is a message that "data is synchronizing". MAC is so SLOW. This process takes 30-45 mins. I have restarted sometimes after but not every time.... I wish I could schedule this on weekend. But man it takes FOREVER...
Please try below steps & keep us posted on your progress: 1. Start Parallels Desktop (Do not start Windows Virtual Machine). 2. Open Virtual Machine's configuration -> Security -> Disable or uncheck SmartGuard.