I tried to install win xp pro sp3, but didnt complete installation. next time i start up it shows, choose ur OS windows xp professional windows xp professional installation default is the later with 3 seconds delay time. I tried to change this by going to My computer<Properties<Advanced<Startup and Recovery<Settings There i select windows xp professional as the default one and by editing it delete the text that reads as "non-execute,....windows xp professional installation", and save the text file then apply and Ok. Next time i startup windows won't login, but it keeps on restarting. Tried the safe modes, couldn't login either. Tried using the XP pro CD to Repair windows but sadly i didn't have a recovery portion disks. As a last resort i tried to install the OS from the cd, the result was even worse, as it shows an error message as txtsetup.sif file missing, couldnt load setup.. I have no idea what else to do now, please help me out.