I think this pretty well covers what you need to do.Hello and welcome.
First lets try this:
Click start/all programs/Accessories/System tools/disk cleanup and check all boxes.
Open IE and click tools/internet options/delete history,cookies and temp files.
Open "My Computer" and right click on your hard drive and choose properties,how much free space do you have left on your hard drive?
Uninstall programs you no longer use.
Delete old files,backup data to external hard drive,CD/DVDs etc to free up space.
Let me know how that goes?