Did this just start happening or was it after you installed the new software?
Have you shut down the computer and let sit for 15 seconds before restarting?
Before doing a full system restore I would remove any new software first and test posting after each one removed (if more than one newly installed program)
I also reformat my computer once a year to keep my system fresh (mainly because I run windows XP and we all know Microsoft

)
Good Luck