|Did you try doing a registry clean before installing the second time? If not the key that is causing this will still be a valid entry, because you re-installed the program.|
Try uninstalling the affected program, remove all remnants of it, you might need to set the computer to show hidden files to do this (Tools/View then check 'show hidden files and folders, you can do this if you open the 'My Computer' window). Run a good quality registry cleaning program to clear out registry remnants but be careful because some registry cleaners are fond of removing valid entries, causing other problems. After doing this try installing it again. If this fails, you may have to contact the vendors. If you don't want to tell them what you did, just tell them the CMOS battery died!
Computers... designed to entertain,help with work but most of all to frustrate you!