When SAS is running, computer at a crawl, for an extended time. SAS says it has been running for over 3 hours, the timer is till incrementing, and CPU still 100%, 3.06GHz Celeron-D, 4GB Crucial RAM, XP Pro 64bit. Task manager confirms that the offending process is SAS. Right click shows this process is running at normal priority, and CPU is at 100%, SAS hitting around 98%. Right click allows me to set priority to Low. CPU still at 100% but PC now responds normally, much faster. So I assume setting SAS to low priority still allows it 100% CPU when nothing else is being done, but other activities can take priority, which is why PC goes faster. Is there a registry hack where I can set SAS process priority, or better still in SAS options?