4xx ERROR! Need Help

I have added my website & sitemap in google webmaster central.

Since last one week I am getting 4xx ERROR.

The most shocking thing is this error has been deducted in that link which I have never created on my website.

Let me explain in brief.

Suppose my domain name is www.xyz.com than i am getting 4xx error for the url www.xyz.com/&usg=ALkJrhhd7h3E9_5r0csCHfvdEN8VVG0V9g.

When i open this link it shows me BAD REQUEST. Now i have never created this kind of link on my website.

I have also visited the Google HELP page for this particular error. there are different status code, but i don’t think so any one of it applies to my website.

I request all the Experts to get me out from this.

Thanks in advance

 

Common (but annoying) problem: If an external website incorrectly links to a non-existing URL within your website, Google Webmaster Tools webcrawl diagnostics reports 404 error to you!

 

Thanks! But what should be done to fix it up. I mean, I have submitted my website to numerous web directories so its difficult to check each one of it.

What should be done to solve this issue?

One more thing! It will affect my actual link form further crawling?

Thanks in advance

 

You can make sure you don't have any internal linking errors. If you don't have any errors, then consider using redirects to fix the errors... Always a good idea to make sure links (from other websites) to your website land at correct pages (also for e.g. improving PageRank of those pages).