All of a sudden, I have no connection to my CD rom drives.  Under hardware there is a yield sign and it tells me to reinstall the drivers.

 

the Read drive NEC NR-7900A  and the RW is Samsung CD-ROM Sc-148C

 

They both worked last week.  I installed a new epson scanner and also a software program - family tree maker.  When I boot, the lights blink on both drives, but I have absolutely no access to them.

 

What might have happened to cause this and where do I find the drivers to install them.

 

ANY help you can give me will be greatly appreciated.  I have Windows XP, Dell Demension 8200 - 512 memory  1.75 GHZ processor - Intell Pent. 4.  I have run both the virus scanner and the adaware program.  Thanks so much for a hint of what to do!!! and what happened.