On some Windows systems, the network device/driver can cause -9093 errors while using Pro Tools LE with small (128 or 256) H/W buffer sizes. One workaround is obviously to raise the H/W buffer size to 512 or 1024, but this results in larger (and undesirable) input-to-output latencies in Pro Tools. There are a few workarounds that allow H/W buffers of 128 to work on most systems. (Both involve temporarily disabling your network device.)

Option 1: Manually Disable the Network Device in your (default) Hardware Profile.
Go 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 LE should perform better with small H/W buffer sizes. To re-enable your Network Device, go back to the Device Manager and uncheck the "Disable in this hardware profile" checkbox.

Option 2: Create a New Hardware Profile with your Network Device Disabled.
An 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 LE" 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 LE" 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 LE" 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 LE. 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 LE" 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 LE to check performance), you can see if the presence of a certain device causes Pro Tools LE to throw errors during playback/record.
Systems using hard drives that do not have DMA enabled (see step 7) are prone to -9093,-9094, and -9129 DAE errors. The procedure below will update the driver provider for the Intel Hard Disk Controller from Intel to Microsoft . It should only be attempted if you are having persistent -9093,-9094 or -9129 errors that have not been remedied by Option 1 and 2 above. If your motherboard has an Intel Chipset (See the Dig i001 for Windows compatibility section at digidesign.com for more information) the following steps will usually make the DMA parameter available for your IDE Drive:
* Shut down your computer and reboot into "Safe" mode by holding down the "F8" or "Ctrl" key at the Windows splash screen (Some PC's may use a different key to enter "Safe" mode, consult with your PC manufacturer if you cannot enter "Safe" mode).
* At the Desktop, choose Start Menu > Control Panel > Add Remove Programs. Select the Intel ATA Storage Driver and remove.
* Insert the Windows 98 SE or ME CD Rom in the CD tray and restart your computer.
* The Hardware Wizard will automatically update the driver. Restart.
* Right-Click on My Computer > Choose Properties > Device Manager > Disk Drives > Generic IDE Drive (usually Type 47) > Settings. Enable the DMA Parameter.
* Enable DMA for other hard drives. Restart.
* Launch Pro-Tools LE and verify that -9093,-9094, -9129 error messages no longer occur.