Hi I resized the cluster size from 4 to 16 using Acronis Disk Director Suite 10. No errors or anything abnormal happened, but when I wanted to reboot I get "A Disk Read Error Occured". This comes before anything OS related runs, right after the Bios stuff. When I load the Windows Vista install CD I can see all the files, so there's nothing wrong with the files. What could be wrong? Could it be that the Bios can't see a partition with this cluster size, or? Since this machine, a HP laptop, has one of those limited Bios'es where you can hardly do anything, I do not know what to do. I have also tried to run Acronis from the rescue CD I have created, but I get an error telling me no disk is found and that it can't run. I then tried to install the OS selector and run the find OS wizard, but it says it can't find any. However, the Windows install DVD tells me it has found Windows on C:, and I can, as I mentioned before, get to all the files from a command prompt. Would it for instance be possible to set the cluster size back for the partition from a command prompt? Anyone here have any ideas what I can do? I do have a full back-up, so I won't loose anything, but would like to save the wasted time of having to reinstall everything if I do not have to.