text: how do i delete second copy of windows on my pc? i need to delete one, b/c i am low on memory.  obviouisly, i need to keep the particular copy that i use.  when my pc boots up i choose the second windows xp.  this is the one i want to keep, i want to delete the first copy.  how do i do this without accidentally deleting the second copy???  thanks!!! what makes you think you have a second copy?  the prompt you get?  this means nothing.  it could be the same copy.  from a command prompt, type: echo %windir%  that is your windows directory. do not delete it.  boot to the other install and do the same thing.  if both say c:&#92;windows then you do not have two copies of windows, you just have a boot.ini file that lists windows twice.  if you do have two copies of windows, then boot into the one you want and delete the folder of the other, as determined by that echo %windir% command before.  then type notepad c:&#92;boot.ini  look at the lines there - it should look something like this: [boot loader] timeout=30 default=multi(0)disk(0)rdisk(0)partition(1)&#92;windows [operating systems] multi(0)disk(0)rdisk(0)partition(1)&#92;windows="microsoft windows xp professional" /noexecute=optin /fastdetect multi(0)disk(0)rdisk(0)partition(1)&#92;winxp="microsoft windows xp professional" /noexecute=optin /fastdetect  note the name following ..(1)&#92; - windows is what you will probably see.  if there's another entry, then post it here and no one will see it because most people stop looking at these questions after they answer them.  so as an alterntive, use a site like www.experts-exchange.com or www.tek-tips.com to ask this question and people will actually have the opportunity to interact with you and help solve the problem.