I have compaq presario c700 laptop.

USB ports are not working in windows.but it is working in BIOS.(e.g usb keyboard.)

I thought that it would be windows problem so I planned  to install new os. Cd drive doesn't work.so I have only option to install through usb.

When I try to install os , after I click INSTALL Button I got error "A required cd/DVD drive device driver is missing...".. what should I do now ? 


Thanks in advance .

Note: first my all USB ports did not work suddenly .then I gave my laptop to service centre. They told that USB ports are shorted and they only made one port to function. But that too working in bios only. Pls see the error below.
http://i42.tinypic.com/242iwk2.jpg

Windows update will do the trick.

I found that the system file checker fixes that up...

Click on Start.
Just above start you will see a search bar "Search Programs and Files"
Search for: cmd
You will find cmd right at the top.
Right Click on it and select run as Administrator
A black box now opens. In there type:
Sfc /scannow

That's it



Hope this helps
Grant - South Africa