Try and Reburn the CD on your friends pc as well as on someone elses writer. I've seen sometimes on older recorders , they record a disk , and the recording process goes 100 % trouble free , but when data is accesed from the disk it gives you an error.Your friend may have a better quality DVD/CDROM than you have and may result in maybe reading the disk.
Try and open other CD-R'd disks on your pc , and make sure your DVD is able to read/open these files
Try and Use Different CD-R Media , on your friends writer . Some Drives , even today have difficulty handling some media brands.