I am fairly new to Mac world (6 - 7 months). I own a software company and our software is PC based, however, many of our customers (Interior Designers) are purchasing Macs to run their business and adding Parallels or VMFusion so they can run QuickBooks and our graphic software Studio. NOTE: The QuickBooks for Mac does not have all the features we need to create the type of proposals in our business, therefore, we recommend QuickBooks Premier Contractor editions for our customers. Question #1 MY CUSTOMER's MAC: One of our customers installed Parallels on her Mac and received error code 1303 "the permission error message." She does not have any anti-virus installed on the Windows side. (Windows 7 64 bit) She is ready to return her Mac, but I know she'll be happy if I can help get Studio installed on the Parallels side. I like have the best of both worlds. We have had her install FireFox on the Parallels side to download our software and even cleaned out her registry. Most of our customers are able to install Studio and QuickBooks without a problem but . . . there are a few that have issues. Question #2 for MY MAC: I have allocated 2 GB for memory on the Parallels side. I have a total of 6 GB of memory. But my heavy memory using programs are going to be on the Parallels side. I am using Microsoft Office for Mac and Aperture on the Mac side but everything else is cloud based. Should I allot more memory to the Parallels side?