This is a Beta test version of X00.SYS. It is readily available by file requesting X00.ARC from 109/106. If you find any problems with this Beta version, please let me know by direct mail at 109/106. Please include a reasonable description of the problem that you are having, as well a description of the computer (including speed) that you are using. Also, give me the exact DEVICE=X00.SYS statement that you have in your CONFIG.SYS file. If you want the latest non Beta version of X00.SYS then you need to request it by version number. For example, X00V120B.ARC. If you do not know the latest version number, then a request of X00V*.* will get you the latest latest official release and the latest Beta version (if a beta exists). Ray Gwinn