You will have to do a manual reinstall, either on the existing hard drive (if it hasn't failed) or on a new drive.  Once an OS other than the original is installed, the recovery partition will not work.   As you have the Windows 7 disc, try the startup repair as a first option.  If it works you won't have to do a complete reinstall.   How to run Win 7 startup repair.
Hi there,   I left for the night to stay with a friend. I usually leave my laptop on to idle with the monitor turned off (power options > close lid). Useful if I'm downloading large files overnight. In this case, I wasn't. I had simply left it and when I returned the next day I was greeted with 'Log on' screen. Which was strange.Long story short, the laptop appears to have a damaged harddisk and/or somehow many have caught a virus. I'm still digging into the cause and what the damage is but I'm also weighing up my options in the event I have to wipe the thing and start from scratch.My Studio 1555 comes with a partition to re-set the machine to it's Factory Settings. I tried to access this using on boot-up but this no longer seems to work. I availed of the option to upgrade my laptop to Windows 7 from Vista. I still have all the installation disks for both the original system and the upgrade... but I would have thought the recovery partition on the laptop would still be accessible?  Is it possible that once upgraded, the recovery partition is no longer available? I've tried as well as navigating and set-up screens with no joy.  Thank for any advice!  -B 
Factory Restore on Studio 1555, Windows 7 upgrade from Vista