dvd writer probs

[aiwa28uk1]

hi
i have been using a pioneer 107d 8x writer it all worked fine burnt at 8x speed read disks and recorded disks then i had 2 reboot my machine as there was problems with my pc now it won't read or burn disks it won't even read original dvd disks my pc acknologies the dvd drive and says it works properly
it will however read cd disks i have not done anything else since i 1st got it it was updated with the latest version firmware and it is still the latest version i have checked my drive and it is still the latest version on my drive i assume the driver is not busted as it reads and records cd disks it can't be the blank disks i use as they are the same ones that i used when it worked fine has any1 got any ideas please.thanx in advance.