Well here are all your drivers: http://support.gateway.com/support/drivers/search.asp?st=pn¶m=EL1200
But this could be Windows corruption (as Windows supplies the drivers for CD or DVD drives, not emachine)
Or it could be that Windows require MS updates to be completed (ie you need minimum XP Service Pack 2 - freely available through Windows Update)
Or it can just be a faulty CD or DVD drive itself (they do fault ;))
One last option would be Virus or malware activity (that could cause any issue :( )
We have an excellent guide h e r e (
http://www.techspot.com/vb/topic58138.html) on help with that. But that would require a New Thread in the Virus and Malware removal forum, for further help
Please let us know which one resolved it :)