How to remove file in Vista

I am running Win Vista on my system. Day before yesterday, I have downloaded a file which my friend had given me via USB pen drive. I saved it to my "D" drive and opened it. I then tried to remove it but unable to do so. How can I remove it successfully?

Have a look at here.

Why can't I delete a file or folder?

Could be a virus issue. Try to scan the file using the antivirus software. Also try to scan the file in safe mode or delete it in safe mode.

Try to take the ownership of the files or folders (if it belongs to a user who don't exists or something similar) and then grant full control access permissions to Administrators group, which supposedly you’re a member of.

For Files:

takeown /f file_name /d y
icacls file_name /grant administrators:F

For Directories (will perform action recursively):

takeown /f directory_name /r /d y
icacls directory_name /grant administrators:F /t

And you want to know why I Love Linux!!