How to remove autoformat

In MS Word, when you select one word and make it highlighted or bolt the whole documents (Pages 1-7) becomes highlighted and similarly when you align the word to left side the whole documents goes to left side. My question is that please intimate me where i will find that option to correct it. Thanks

You can't align words in MS Word, only paragraphs. So you're still not clear.
The bold problem seems clear however. That's no official option. That's an error.

Things to try:
1. Find and delete your default template normal.dot (using Windows Explorer or My Computer)
2. Run Word in Safe mode to see if that makes a difference: http://wordprocessing.about.com/od/troubleshootin1/qt/safemode.htm
3. Repair MS Office by running setup from the Office CD.

Kees

And more about the align problem.

If you have any line of typing which spills over to the next line there is a hidden "soft line break" at the end of the line. This means that attempting to align left a line of typing will align the whole paragraph to the left.

If you have two lines of typing separated by a soft line break and want to align just one of the lines, you need to separate the lines with a hard line break by pressing Enter at the end of the line. That way each line is treated as a separate paragraph.

Mark

Morevover, apart from 'soft line breaks' there are 'hard line breaks' (shift-enter). A copy-paste from some sources (pdf, mail, browser) may result in a document with only such hard line breaks and no paragraph mark at all. And that's rather fatal if you want to align only part of it.

So it could (partially) be a problem with this specific document (and not with Word generally) also.

Hope this helps.

Kees