Access Performance FAQ - local default printer instead of network
If your system is painfully slow when updating forms or reports in design view try creating a local printer and setting that as the default printer. This could be a PDF printer such as the open source PDFCreator or free CutePDF Writer. This may be more applicable to Access 2007 than previous versions. Alternatively just create a generic printer.
The above was just added the to Microsoft Access Performance FAQ page.