If you don't already have a CD Burner, you need to get one. Save Pictures and Music to a CD.
Next, do a little "Clean Up":
Click on Start-Search-Files or Folders, type "*.tmp" (without the quotes), click on the "Search" button. Once all the files show up in the box, and there can be quite a few some times, click on "Edit" in the upper left of the window, choose "Select All" and all the files will be highlighted. Then click on "File", choose "Delete" and the files will be deleted. You can safely delete .tmp files, as they are only temporary files and are placed by Windows when using various programs.
Next, do the same procedure for .chk files that have been placed there by the Scandisk program after a bad start up. Click on Start-Search-Files or Folders, type "*.chk" (without the quotes), click on "Search" button. If any files are found, delete them using the "Edit, Select All, File, Delete" method from above.
Next, you need to clean out all files from these folders. C\Windows\Cookies, C\Windows\History, C\Windows\Temp, and C\Windows\Temporary Internet Files. Start by doing this. Click on Start-Settings-Control Panel, double click on the Internet Options icon. When that loads, make sure you're viewing the "General" tab, then click on the "Delete Files" button in the "Temporary Internet Files" section. When the little box pops up, place a CHECK mark in the "Delete all offline content", then click on OK. Now click on the "Settings" button in the "Temporary Internet Files" section and change the number on the "Amount of disk space to use" section to a number of 5. (Some default settings allow for hundreds of mb in this area) Click on Ok, then "Apply" if its not grayed out, then Ok again.