My father had a older Pentium D that he stopped being able to get online with, Was doing weird things with the built in Ethernet, Could see the home network but couldn't get to the internet so I installed another Ethernet I had on hand and it worked until reboot then stopped working. Every time I switched from one to the other it worked for a very short time then stopped and finally the built in one disappeared and the PC couldn't see it. So I built him a new one figuring the thing was old and hardware was dropping like flies so I ordered up a I5 for him and reused the hard drive since that was upgraded to a seta not too long ago and Kept the old info with win XP there so he could recover his files. Now he has win 7 64 bit and all was running well until he called me saying his DVD stopped working??? It was from the old system so I just ordered a new one and tonight I installed it and the new one doesn't work and I even got one I know works from my system and tried it and all 3 of them are saying the device driver is disabled. One IDE and 2 seta drives so there is something disabling the drives now. And he said when he noticed not working he had gone into the old winXP folder to get his files and put them in the now folders. So I'm thinking a virus was the culprit and now has attacked the win 7 but disabling the DVD instead of the Ethernet. AVG and Norton along with a few others that don't detect anything. Hoping to find a fix so I don't have to do a full format. Might try to install my extra hard drive to see if it all works on that so I can confirm the hardware is good. But if any of this sounds like a virus you know of let me know and I'll just have to break it to dad his files are deadly and have to go.