On reboot, after scheduling a full CHKDSK run on the C: drive of my Asus Laptop (running Vista), it complains "Cannot Open Volume for Direct Access". I have tracked this down to Acronis True Image V11 (latest build) by rebuilding the system starting from the Asus recovery partition and adding each application in turn, confirming that CHKDSK still works after each new addition. CHKDSK works fine untill I install TI 11 as the last package. I can reload a save that doesn't contain TI 11 (using a TI 11 Recovery disk, the save was also taken using a TI 11 recovery disk) and CHKDSK works OK on the recovered system. As soon as I install TI 11, it stops working. For good measure I tried installing a trial copy of TI 2009, and it caused the same problem. The system is very simple. It comprises: - Vista loaded from the supplied Asus hidden partition (fully patched). - Norton Internet Security 2009 (fully updated). - M/S Office 2007 (fully patched). I've tried disabling the Try & Decide & True Image schedule services and this makes no difference. Are there any other service that True Image installs that might be started early enough in the boot to lock the C: volume? Has anyone else come across this problem? Thanks for any help. Dave.