On some Windows systems, the network device/driver can cause -9093 errors while using Pro Tools FREE with small H/W buffer sizes. One workaround is obviously to raise the H/W buffer size, but this results in larger (and undesirable) input-to-output latencies in Pro Tools.There are two other easy workarounds that allow smaller H/W buffers to work on most systems (both involve temporarily disabling the network device)...Option 1: Manually Disable the Network Device in your (default) Hardware ProfileGo to the Windows Control Panel and open the "System" applet. On the "Device Manager" tab, expand the "Network adapters" item, and then double click on the icon for your network device. A properties dialog will open. On the "General" tab you'll see a checkbox for "Disable in this hardware profile." Check this box and close all the dialogs. You shouldn't need to reboot -- your network device has now been disabled and Pro Tools FREE should perform better with small H/W buffer sizes. To re-enable your Network Device, go back to the Device Manager and unchecked the "Disable in this hardware profile" checkbox.Option 2: Create a New Hardware Profile with your Network Device DisabledAn alternative to manually enabling/disabling the Network Device in the Device Manager (option 1 above) is to create a new Hardware Profile and disable the Network Device in that profile. This option is a bit cleaner/simpler, but does require you to reboot Windows when switching between Profiles. To create a new profile, go to the Windows Control Panel and open the "System" applet. On the "Hardware Profiles" tab select the "Original Configuration" profile (or whatever profile you typically use) and click the "Copy..." button. Name the new Profile "Pro Tools FREE" or something similar and press OK. Click OK to close the System Control Applet, and then reboot Windows. Each time you reboot, you'll be given the option to select which Hardware Profile you'd like to use. Select the "Pro Tools FREE" profile you just created, and when Windows is fully booted follow the steps in Option 1 (above) to disable the Network Device in your current profile. From now on, whenever you boot Windows using the "Pro Tools FREE" hardware profile the Network Device will automatically be disabled. If you boot Windows using the "Original Configuration" Profile, your Network Device will be enabled.Note:Some other devices (in addition to Network Devices) can cause similar problems/conflicts with Pro Tools FREE. If these devices are not necessary while running Pro Tools (e.g., other sound devices, modem devices, FireWire/1394 Controller devices, etc.) you can disable them as well as your network card in the "Pro Tools FREE" Hardware Profile.If -9093, -9094, or -9128 errors are happening frequently, the methods above can be used to identify which device is causing the problem. By systematically disabling one device at a time (and then running Pro Tools FREE to check performance), you can see if the presence of a certain device causes Pro Tools FREE to throw errors during playback/record.