I would disable all HP related startup options. They are generally not needed. Do this by typing "msconfig" into the Run box (Windows+R), going to the startup tab, and unchecking all options that are related to HP. (Heck, uncheck most everything besides antivirus software and system drivers. Startup items here are usually not essential.)
Also, with Vista/7 I don't think you even technically need drivers for the printers to print. BUT - you do need them for scanning. So anyway if you don't need scanning functionality I would just uninstall the drivers completely and have windows do the printer connection itself (Control panel > add a printer)
Also, with Vista/7 I don't think you even technically need drivers for the printers to print. BUT - you do need them for scanning. So anyway if you don't need scanning functionality I would just uninstall the drivers completely and have windows do the printer connection itself (Control panel > add a printer)