I am running Windows Vista on three work machines here at my office. Each MBP is running Parallels 4.0 with Windows Vista Business. Each system is experiencing incredibly long start up / shut down processes (sometimes upwards to 15 minutes to shut down). Applications are slow to respond, stalls, or not responding period after 10 - 15 minutes of attempting to load the program (ie. Office 2007, etc.). Are there any suggestions, tips, tweaks out there that others may have to correct this issue? It has created an unbearable working environment with trying to go through the workday without having a user not being able to access a required software application inside Windows. System Specs: Macbook Pro Intel Core 2 Duo 2.53 GHz 4 GB Ram 360 HD Parallels Specs: 4.0 Build 4.0.3844 Windows Vista Business Virtual Memory Allocation, 2086mb HD, 40gb Video Memory, 250mb Any help would surely be appreciated.