Hi! Several minutes ago, I got Windows mode to run with UMBs to run from DOS. However, when I tried to run the DOS prompt from Windows, I got an Out of Memory error. 🙁 I rebooted in DOS mode--not from the Shut Down menu but a full restart--and found that DriveSpace was eating most of memory. I disabled the dblspace setting in MSDOS.SYS and rebooted the system, and after logging on got system crashes by the minute. 🙁 I tried also disabling drvspace and doublebuffer and got the same. 🙁 If anybody has any other ideas, I'm all ears. BTW, I'm willing to share my system configuration and memory layout here. BTW, how do I get a log of QEMM's MANIFEST utility's output?