can't copy/paste

All of a sudden I can't copy and paste . I have tried right click copy and then gone to Works or Incredimail new message then right click but "paste" is greyed out. I have also tried Ctrl/c and Ctrl/v and that doesn't work either.I am using Vista Home Premium 32. Any advice would be very much appreciated! Thanks.
 

My Computer

System One

  • CPU
    Intel Pentium Dual core 2.2GHz
    Memory
    RAM 4 GB
    Hard Drives
    250 GB C: drive
    Maxtor one touch 111 external HD 250GB
    Mouse
    Logitech Wireless
    Keyboard
    Logitech Wireless
    Internet Speed
    Broadband (don't know speed!)
I have tried that but it still doesn't work. I'm wondering if the update I did for Incredimail has got something to do with it. I'll try re-installing it and see what happens.
 

My Computer

System One

  • CPU
    Intel Pentium Dual core 2.2GHz
    Memory
    RAM 4 GB
    Hard Drives
    250 GB C: drive
    Maxtor one touch 111 external HD 250GB
    Mouse
    Logitech Wireless
    Keyboard
    Logitech Wireless
    Internet Speed
    Broadband (don't know speed!)
Followed you instructions and copy/paste IS enabled, I have also updated and repaired Incredimail. Result? Sometimes I can copy/paste and sometimes I can't!! Never mind, I can usually find a way round it. Thank you for all your help.
 

My Computer

System One

  • CPU
    Intel Pentium Dual core 2.2GHz
    Memory
    RAM 4 GB
    Hard Drives
    250 GB C: drive
    Maxtor one touch 111 external HD 250GB
    Mouse
    Logitech Wireless
    Keyboard
    Logitech Wireless
    Internet Speed
    Broadband (don't know speed!)
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