Booting Corruption

How to corrupt booting files and solution:

In our computer some files which known with booting files and with help of these files our computer hard disk boot these r always in c: drive and in case of xp 7 booting files
1. boot.ini
2. ntldr
3. autoexec.bat
4. io.sys
5. msdos.sys
6. config.sys
7. ntdetect.com
these all 7 files always hide in c: drive if u want to show file so go to start and run then
1. cd \
2. c:\>attrib -r -h -s -a ntldr
3. go to c: drive and see there is ntldr file show
4. right click it and open with notepad
5. edit it some words and save
6.now restart your computer after restart your computer will not run and a white dot will blink in top corner of monitior or LCD
7. for solve this problem boot your computer with windows XP cd
8. there will three options come
a. Press enter to install windows xp
b. to repair window press r for recovery console
c. press f3 for quit
9. choose second option "r"
10. press 1 and enter
11. there will same screen like cmd do there cd \
12. c:\>dir
13. c:\>del ntldr
14. c:\>dir
for see your ntldr delete or not
15. c:\e:
then select e: drive or d: drive or g: which your cd rom take see dir of all
16.e:\>dir
see there is windows xp cd files and i386 directory is also present there
17.e\>cd i386
18.e\i386>copy ntldr c:
type exit and now your computer problem solve.

Thanks...