Laptop help.

[Matt]

My laptop is running slow as shit.
Rarely use it now but it's how I get my pictures online and music on the iPod.

I have a 120gb hardrive which is 3/4 full of programmes pictures music and NVQ work.

But recently it's running so f*cking slow, to the point I could walk to the liabrary use one of there computers and still walk back before mine woul e done.
Constantly says not responding when doing anything
Has taken me 35minutes so far to look at a picture on my sd card
I it likly to be slow because of the amount of files or do I have sone badass virus? Its really starting to piss me off
Help please