I am trying to install windows 7 on my hp pavilion dv6-2165tx laptop. I bought the laptop with windows 7 HP installed on it. Then I had to format the disk and install ubuntu. Now I want to install windows on it so I formatted the disk. But when I go to the fourth step of the installation I get "CD/DVD driver is missing plug a dvd/floppy/usb to install it" something like this. After giving a dvd driver I get message "device driver missing ".I tried a lot but I can't go any step further.
I tried to repair the computer in the second step but it shows an existing (X

of size 30MB on it and it has "program files" and "windows" and "Users" and "System" folders in it. I think it is the part of the previous windows on it. I tried to remove it but it shows "access denied" for the folders and files. I tried to restore the windows but due to denied access to the files of X: , I can't do that too
any suggestions...