i want to do a repair of my windows Xp and i can;t boot from my cd driver. i open bios and set dvd driver as first option but nothing happen, any way my pc enter with my hard drive as usual. when a open BIOS i see that DVD cd driver has nothing, but my hard drive has a plus sign. I try to open from MY COMPUTER click on DVD CD driver but windows don't let me that way because the CD i am using is a version older that the one i have now.and i don't want to do a new installation. I don' want delete everything. only repair the one i have. My pc is an old compaq presario S4000NX.Thank you.