Posted this thread over at DSLR/Microsoft help yesterday, but no joy. Yesterday, I installed SP2, seemed pretty painless and soon got rid of things I didn't want such as the FW and Security Centre. As I rebooted and re-enabled Process Guard (disabled for the installation), I noticed something I'd never seen before and I'm at a loss to explain it. System32\imapi.exe tried to gain WRITE access to system32\devldr32.exe. Now, as you all know (?) imapi.exe is Microsoft's Image Mastering API for CD Burning and devldr is part of my Creative labs SoundBlaster Live soundcard. Why on earth would a CD burner exe want to access devldr My PC is, as far as I am aware, so clean it squeaks and I'm sure it is not an infection of any kind - everything here is up to date and I've even checked the Kaspersky on-lin scanner as insurance. All clean. For the sake of peace and quiet I put imapi.exe into Program Protection and give it Write privileges, so hope that was the correct thing to do. Secondly, this morning I noticed sys32\defrag.exe also wanting to WRITE to devldr.exe. Anyone any ideas as to what is happening? What I do feel sure about is that it has to do with SP2 and is probably a minor glitch that will be ironed out at sometime...but any theories would be welcome.