Re: [Trisquel-users] Grub deleting windows xp and 7 boot files

[onpon4]

That's a very non-specific question. You ought to provide details if you want  
a good answer. Like what exactly your installation process was, and what  
happens when you try to boot Windows now. Please as well don't generalize  
your problem; it's unusual. Normally, the only particular effect of  
installing GNU/Linux alongside Windows is that Windows has to do a disk check  
to make sure there aren't any problems (because the partition size changed).  
If you're unlucky, you might need to enter a recovery environment, but that's  
been included in a separate partition alongside Windows ever since Windows  
Vista. (I guess something like it might have been on a CD for Windows XP, but  
I'm not entirely sure.)