Copy and Paste feature not working

I am on Windows xp Pro and all of a sudden I am unable to copy and paste.

 

If I highlight content from within a web browser IE or Avant Browser, I am able to highlight it, I am able to select copy from the drop down menu but then when i go to paste it into either the googles search bar or the address bar or even simply to note pad it is not working.  I even tried writing text in notepad and copying and pasting it but nothing.

 

In addition, I am unable to copy and paste objects from one explorer folder to another.  As well as working with programs such as Paint Shop Pro or Animation shop, while I used to be able to copy files from these programs that is no longer working.

 

If I copy to the address bar it acts as if it is pasting but then it just appears blank once the operation is complete.

 

I just recieved these alerts for the first time....I don't know if they apply

 

--The instruction at "0x62308d19" referenced memory at "0x02003834". The memory could not be read.

 

--The instruction at "0x77f5171c" referenced memory at "0x02aa0010". The memory could not be read