I have 2 PC with the same configuration. I open an Excel File (~5M) on the network from both PC. The opening is not the fastest but that's ok. The problem is that on one PC, Excel is really slow. I mean if I hit the left arrow 10 times, I will have finished hitting like 3 seconds before the active cell is the next 10th one. The file contains graphics that takes time to initialize on the slowed computer. Both PC have the same graphic cards, same driver version; both remote access to the file on a local network. Both configured to perform calculations automatically. Both Excel 2007. Both Windows 32bit. On the other PC it runs really fast. I really don't know what to check next. Any suggestions ?