Removing Your Temporary Files
Over time, temporary files used by Windows can accumulate into a considerable amount of disk space. Browsing the Internet, using Web applications, installing software, and deleting files are some of the ways you accrue temporary files. You should try to remove these temporary files at least on a monthly basis; weekly if you use your PC heavily.
Instead of manually deleting each type of temporary files, you can use the Disk Cleanup utility that comes with Windows. Simply click Start > All Programs > Accessories > System Tools > Disk Cleanup. If you have more than one hard drive, you'll be prompted to choose which drive to clean up. You can start with your main drive (usually C) and repeat the process for the others. Once your computer is scanned for its temporary files, you'll see a window similar to Figure 4.
Now you can select the types of temporary files you want to delete. All categories are usually safe to pick, but keep in mind the tip given in the previous section where you may want to wait on emptying your Recycle Bin.