( I have ProTools 7.4 LE running on Windows 7 64-bit Professional with all updates and fixes except Windows 7 Service Pack 1 for 圆4. Very easy to use and priceless for saving time and precious projects. I highly recommend True Image for fast easy backup and recovery of system which makes life much easier. I did start with fresh and clean install of Windows 7 64 bit ( without SP1) thanks to Acronis True Image to avoid any potential problem with previous Pro Tools install. Log in to an account with Administrator rights. If you want to pause any of my slideshows click the numbers (e.g. After the switch to Windows 7 Professional 64 bit it was not possible to start Pro Tools 7.4 LE and I was getting error 0xc0000005 : PT 7.4 LE on the Windows XP was great DAW for recording our string quartet for hire in Ireland.