Best defrag software

You asked for best defrag software.
I like My Defrag, and it's free.
When to defrag, you can check once a month like ijack said, but I usually do it when I start to see my computer slow down.

best to analyze it first then it will tell u whether u need it or not.

I usually defrag after any major installs or uninstalls, or if I've moved or copied a lot of files around. Depending on what type of defrag I want and how fast I want it to take, I switch between Microsoft's contig (http://technet.microsoft.com/en-us/sysinternals/bb897428.aspx) using Power Defragmenter as the GUI interface (if you're on XP use version 2 of PD; if on a newer OS use version 3). If I want something a little more powerful, but slightly slower (though not slow compared to many other defrag programs) and love seeing the graphical display of blocks being moved, I use Defraggler (http://www.piriform.com/defraggler).

Please excuse my ignorance but ackronyms mean nothing to me and the computer is similar to going to a foreign country and not knowing the language and asking for directions, but I thank you for your response.
Len

Sorry. SSD (I presume this is what you mean) means Solid State Disk, as found in some netbooks or high-end computers. If you don't know what it means you probably don't have one!

IJack: the unfortunate thing is that the comment was not directed particullary at you personally, after reading the replies there were so many references using ackronyms I was totally confused. But I do thank you for clarifing the ssd for me as I wasn't aware of that either. The only thing high end about my computer is where I have it placed.(Ha,Ha).
Len
P.S. I have a question you may have an answer for and that, is how to find the protocols for the forum. Would be appreciated if possible.
Hope your ready for the Holidays if you celebrate and the best to you and yours if you do.

I'm afraid I really don't know the answer about protocols.

Anyway, yes, I do celebrate the holiday (though not in a Christian sense). All the best to you also.

Regardless of how you celebrate I can only thank you for your quick response which is truly appreciated, even though it doesn't address my querie. If your able to forward the querie to others in the know, it would be appreciated. I tried to post an initiated request regarding those of us that do not have the computer knowledge but received no response whatsoever. But once again , I truly thank you for your response.
Len