Slow-freezing-after two months downtime

I recently moved and my computer was down for two moths with no internet access. I have been working off a laptop and looking forward to getting back on so I can really get some work done. Running fine before storing and moving. First day up and it runs like molasses. Both MSWord and/or OpenOffice running terribly and freezing up after every command. I have work due and can hardly send email, much less write a complete article in word. Dumped temp files, updated, the restored thinking updates were problem then updated again. In word, it will not highlight. I cannot drag files around as the computer acts like it only recognizes some of my mouse commands.
How can I get my speedy computer back in shape?