Many people having the same problem that their computer is slower and 90 percent don’t know why the reason behind it! Yes computer is getting slower and slower because it may be caused that your memory is small according to your computer. Mostly peoples have a fear that their computer is slow because of viruses but its one side truth most of the times our computer disk full because of applications files documents and at this time our computer needs some extra memory, its not hard disk but its RAM for handling instant process and I think this is the right time for Adding Computer RAM before any other problem arise due to lack of memory, so if you decide that you are upgrading you pc that I recommend to check good store for availing the parts because some times innocent people are fraud by duplicate parts so be aware. I know a store called memorydeal.net which is known for their good service as well best products. Memorydeal.net provides large range of products for your pc upgrade you can check here for different types of RAM also available! So when you want to upgrade your RAM noted down the RAM model no. e.g DDR PC2700 for avoiding any hassle at the time of installation.
If have IMAC you can also Add IMAC Memory for your pc from this store without the problem of duplicate because they offers only genuine products, so check their websites for new products & upgradations.