I re-did my problem again: I have got "mbam.exe Applicarion Error" message after I installed the current version 1.50 and applied for update data. As which the message is below: The instruction "0x10003d70" referenced memory at "0x000____" The memory could not be "read". My system is using Windows XP and Symantec Endpoint. I tried to remove and use Safe mode to reinstall mbam v1.50 but no luck still the same. (Then, I tried your advise but no hope:)Please use this method for a clean reinstall of V1.50 - Make sure you disable your Symantic as you install the new copy of V1.50 then check for other updates - To Fully Remove and Reinstall a Fresh New Copy of Malwarebytes - Read Carefully Windows XP: Click on Start and select Control Panel Open Add/Remove Programs Uninstall Malwarebytes' Anti-Malware Restart your computer very important ! Download and run mbam-clean.exe from ->Here It will ask to restart your computer, please allow it to do so, very important After the computer restarts, temporarily disable your Anti-Virus and install the latest version of Malwarebytes' Anti-Malware from ->Here (Then, today I found from Event Viewer:)I have look Under Event Viewer of Application in which indicated the EventID:1000 and description is Faulting application mbam.exe, version 1.50.0.0. faulting module msvbvm60.dll, version 6.0.98.2, fault address 0x000e450a. I hope this may help and look more details into my causing problem. Please advise me. ******** My system is using Windows XP SP3 and Symantec Antivirus Coropration v10.1.8.8000 not the Symantec Endpoint. ********