Windows 7 Tip: 
One of our reader recieved a Locked PDF File and He don,t knowthe password to Unlock it, so here am let you know hot to Unlock PDF files Easily. Free PDF Unlock Online Utility is in beta stage, and easily removes the protection from a PDF file to view its content. You might need this tool in cases where the author has used a font which is not available by default in Windows.
To unlock a PDF file, enter it’s location in the “PDF file to unlock” field, by either typing it in the field or clicking on the “browse” button, then navigating to it’s location.
The unlocked version of the PDF will be displayed in a new browser window, opened in the default PDF application for your system
Free PDF Unlock Online Utility
At last I can unlock all of those PDF files of mine of which i don’t remember the password. This is a great utility above all for those people like me who are a little…unattentive! Thanks!
@ Webtalk
Yes this One is free and Easy to use.
thanks