Visiting friends at the moment and they have a pc problem. Went to switch it on yesterday and it says there was a problem and gives the option to start in safe, log on normally or use last successful settings. No matter which you choose nothing happens. Tried the f8 trick and still won't start in safe, chose repair but it asks for an administrator password and we have no idea what that is. System is running xp professional as it was bought on a deal through work. Would prefer not to have to reinstall windows if possible. Can anyone offer any advice? Thanks