How to fix this error reporting which says "musix.exe has encountered a problem and needs to close. We are sorry for the inconvenience."? How is this error caused? Is it a virus or a spam? Its very irritating as it pops up at frequent intervals. Please let me know.

Your computer is infected with malware. You need to clean it up. Go through these general malware removal steps systematically - http://www.elephantboycomputers.com/page2.html#Removing_Malware Include scanning with David Lipman's Multi_AV and follow instructions to do all scans in Safe Mode. Please see the special Notes regarding using Multi_AV in Vista. http://www.elephantboycomputers.com/page2.html#Multi-AV - instructions http://tinyurl.com/yoeru3 - download link and more instructions When all else fails, get guided help. Choose one of the specialty forums listed at the first link. Register and read its posting FAQ. PLEASE DO NOT POST LOGS IN THE MS FORUMS. If you can't do the work yourself (and there is no shame in admitting this isn't your cup of tea), take the machine to a professional computer repair shop (not your local equivalent of BigComputerStore/GeekSquad). Please be aware that not all local shops are skilled at removing malware and even if they are, your computer may be so infested that Windows will need to be clean-installed. If possible, have all your data backed up before you take the machine into a shop.MS-MVP - Elephant Boy Computers - Don't Panic!