This feature has worked for me only once since I've been a Parallels user. About two days ago, I started up Parallels and was informed of build 1988. I didn't want to download and install at that time, so I declined the offer. I've not gotten any other startup notices about the update. Manual checks for update have NEVER worked for me. Please fix this feature. Yes, I know I can manually download the update, but that defeats the purpose of the automated update feature.