I've been using OS Selector (8, I think) for quite a while with my old W2K laptop and even old Win98 PC. I've generally had few problems with it, until last week. I bought a new HP laptop and wanted to repartition the hard disk (from a single ~100GB partition, into two 50GB ones). This action OS Selector performed without any problems. However, upon rebooting into Windows I got a Blue Screen of Death (and sinking feeling in the pit of my stomach) with the following error: CONFIG_LIST_FAILED The full description can be found on Microsoft's site: http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q291808. My error was specifically a 0xc000017d/STATUS_NO_LOG_SPACE type. The good news is that going back into OS Selector and expanding the original partition back to the full size allowed Windows to boot properly. I did this procedure a number of times along with some defragmenting etc but with the same results . Last night, on the off chance, I used a Mandrake 10 install CD to resize the C: partition and leave the rest of the disk as free space. I then quit the installer, rebooted into Windows, and hey presto! I had a single 50GB partition. Windows was then able to create the extra partition I wanted in the free space. I'm slightly annoyed that software I paid for (and have recommended to others) failed in this situation where free software was apparently superior. Does anyone have any ideas why OS Selector messed up? I can supply the output from the Acronis log tool if required. My only thoughts are that Windows got confused about the amount of free space it had (i.e., it thought it had ~90GB but then ). It might also be an issue related to HP's special partition for the QuickPlay music/dvd thing. Jamie P.S. I'm writing this in the forum because it contains useful information for others that experience the problem.