Answer to: boot disk not found doesn't go awayDo you have a Windows 7 rescue disk? Can you boot this from your CD/DVD drive? Alternatively, do you have a bootable USB key? If you have another computer (laptop) running Win7 with a burner, you can make a rescue disk. Go to Control Panel\System and Security\Backup and Restore and Create a System Repair Disk on the left of the panel. Then try to boot this from your CD. You may have to review your BIOS settings to make sure this is enabled.
Answer to: Garage door closes after openingThere is an 'open force' adjustment that can be changed. Sometimes it goes out of adjustment over time as the weight of the garage door can change with humidity or moisture and/or the springs change tension especially after being replaced. Or as machead3 states, through vibration from ther drive train. The manual for this opener can be downloaded: http://www.managemylife.com/mmh/pd_downl... Reference page 13.