VisualStudio "Find in files" not working

The "Find in files" function of Visual Studio (2008 or 2010) stops working. Whatever I search for it always says "No files were found to look in. Find was stopped in progress". It is very annoying. Since I have only found solution in blog.

The solution is to press Control + Scroll Lock and all is fixed. It works smart! :)

At present, the workaround is to press

• Ctrl + Scroll Lock
  
• Ctrl + Break
  
• The Break key alone
  
• ALT + Break
  
• ALT + Scroll Lock

Thanks.