NEED HELP ASAP

How do I locate and delete a file on MS-DOS Prompt? Just the commands? If it's too complicated to explain please link me to a relatively accurate and easy-to-understand tutorial.

Here are some basic commands:

to see a directory listing use: dir
to change directories use: cd
i.e. cd c:\dirName or cd dirName
to delete a file: del
for more details, type the command and /?
i.e. dir /?

You'll need to know what directory your file is in and navigate to it or just type the path to the file. For example you want to delete test.txt in the test directory off of the C drive you could simply type at the prompt

del c:\test\test.txt


I don't recall whether you get a warning prompt or not, so be careful you get the correct file.

It seems I deleted the file, but a component is missing that won't allow me to delete it entirely. Somehow this was downloaded onto my computer without my consent, and went straight into my system files. Whenever my internet funks out, a popup that has to do with this file comes up. Is there anyway of finding out the relating files that had to do with this main one I deleted?