Products Affected Apple Thunderbolt Display (27-inch), Boot Camp, Windows 7 Symptoms When using Boot Camp and Microsoft Windows 7, FireWire (IEEE 1394) devices may affect system responsiveness if they are connected to the FireWire port of an Apple Thunderbolt display. Resolution Try the legacy FireWire driver that comes with Windows 7: Choose Windows > Start. Right-click on Computer. Select Manage. Click Device Manager. Click the disclosure triange to expand the IEEE 1394 Bus host controllers. Right-click the 1394 OHCI Compliant Host Controller. Choose "Update Driver". Click "Browse my computer for driver software". Click "Let me pick from a list". Select the 1394 OHCI Compliant Host Controller (Legacy) driver