Couple of download ?'s

Recentley I had problems with d drive, where I had most of my download files stored. I had the d drive removed and now I am putting everything into c drive local disk where I have a lot of space. However, I am having problems with the areas.

1. I tried to download spamfighter and when it tried to install after the download was completed. I got this Error 1327 >invaliddrive.D:\

2. I used nero to burn cd's and when I tried to reinstall it from the disk I got this.
"An error occured durthing the copy process(filename) error 6 the handle is invalid".

When I tried to change the path d drive to cdrive it would tell me there was no file.

Would apprciate any help.

Thanks!!