hi
i have go an hp pavilion desktop pc with an existing windows xp.I have created another pimary partition using partition majic.I want to now install fedora 7 on it .I heared that there is some that the grub gets erased or some sort??.im a new user to linux so please excuse my ignorance.Also if i could get please some infomation on linux installation??

Just take care not to install on the wrong partition. Look at the size of the partitions as an hint. If 2 partitions have the same size, be very careful.
first primary partition is called sda1 and second one is called sda2. On the second hard disk, it would be sdbx (x is a number).
Backup important stuff before.

Fedora installation process will suggest to install grub, which will erase your mbr (master boot record) and replace it with grub. grub is able to boot windows as well as linux, so nothing should be lost. Having a windows boot CD can be handy to fix the mbr if grub install goes wrong (power failure, bug or human error)

Regards

Here’s the installation manual for Fedora 7. Have a cursory read through that before beginning.

http://docs.fedoraproject.org/install-guide/f7/en_US/

Have a close look at this part on the boot loader (read ahead a few pages)

http://docs.fedoraproject.org/instal...ootloader.html

Grub will be installed on the Master Boot Record or your drive at some point toward the end of the installation process. I’m not a Fedora user, but it seems to be the case that the Grub configuration will most likely detect the presence of Windows on the machine and add it to the menu of available operating systems to boot.

What gets “deleted” is the Windows boot loader. But Grub makes a fine replacement to that. I’ve been dual booting Debian and XP for a number of years with Grub.

Of course (and this is always the case when playing with partitions and boot records) ensure that you have an up to date backup of your data and recovery/reinstall disks for Windows and it’s programmes.

Good luck.
Red

And if you're unlucky and the installation does not restore somewhere the Windows boot loader, you'll still be able to restore it by booting from the Windows installation CD and switching to the Windows-repair-console-thingy - this until you understand how to fix the problem with the MBR and the boot loaders.
A hint: if you don't plan to play games or run some ultra-heavy-duty in Windows, you could have a look at VMware-workstation, which is free and allows you to run Windows & MacOS OSs under Linux emulation. MacOS works but is terribly slow, while Windows works fine. Very nice. An alternative would be Xen, if you have a processor which supports virtualization technology.