Thanks Computer Guru,
"I can try that for you!"
after trying your last said method, my PC unable to boot on both OS (XP & W7). There is a massage on bootup "A disk read error occured / Press Ctrl+Alt+Del to restart"
After that, I have to reformat my C: drive again. Working fine now with lot of Softwares. And my W7 is still not working.
What to do now?