Per instructions received here http://www.malwarebytes.org/forums/index.p...error+code+0,48 I have performed the check list of steps with the exception of running a Malwarebytes scan, due to the fact that this is my original issue. If you refer to my original post you will see that I cannot get Malware bytes to run, regardless of whether or not NIS is disabeled or installed. The problem manifested itself during an update of a Malwarebytes install that had been installed and functioning for more than a year. I continually receive the 703 (o,48) error even after completely uninstalling it. running mbam-clean, disabeling NIS, and then completely uninstalling NIS (don't get me started on that fiasco), manually cleaning the registry for any Malwarebytes remnants after the mbam-clean. I have performed probably close to a hundred Malwarebytes installs for my clients and have just recently become a Malwarebytes reseller (yes-we are a network integrator). This is the first time i have not been able to overcome an installation issue. So... less the Malwarebytes scan results wich I cannot provide since it won't run, I have performed the following per your instructions: Ran Defogger to disable the CD-Rom Emulation software Run DSS with the reports posted below and attached the log Run the GMER Rootkit scanner and attached the log file The DSS and GMER logs are zipped and attached to this posting. I await your response. Thanks in advance for any assistance you may provide. DDS (Ver_09-11-29.01) - NTFSx86 Run by Gary at 17:02:42.40 on Sun 11/29/2009 Internet Explorer: 7.0.6002.18005 Microsoft Attach.zip