We are going with Microsoft Security Essentials for the first part of 2011.  We change antivirus platforms about every couple years based on what is performing the best, catching the most viruses, and free.

First it was AVG, then Avast, now, MSE.

MSE is free for all home computers, and small businesses with up to 10 computers can use it according to the licensing.

You can very easily download and install it - and you are on your way..

AS USUAL - we do not recommend ANY 'pc cleaner' or 'c cleaner' or 'reg cure' or any other software to 'optimize' or 'cleanup' your PC - 99% of this software will make your computer worse than before you started.

Stick with Antivirus to keep the computer free of infection, and remove un-used software on an as-needed basis to keep your computer clean. 

We have a tune-up service for this exact reason, if there was a good software that could do it - we would point you at it!

Read More about why software can't do a PC Tune-Up here on the blog