If the Windows power-saving features conflict with those of your PC, your PC may not wake up from Standby mode, or it may lock up unexpectedly. If you run into problems, display the Power Management Properties dialog box again, and then open the Power Schemes list and choose Always On . Your hard disk probably contains temporary and backup files that your programs create without asking your permission. These files can quickly clutter your hard disk drive, taking room that you need for new programs or new data files that you create. To delete .TMP files, click the Windows Start button, point to Find , and click Files or Folders .
Web browser saves truckloads of files so it can reload Web pages more quickly later.
To reclaim this disk space, clear the disk cache from your hard drive. To clear the disk cache in Internet Explorer, open the View or Tools menu and click Internet Options . Under Temporary Internet Files, click the Delete Files button. In Navigator, open the Edit menu, click Preferences , click the plus sign next to Advanced , click Cache , and click the Clear Disk Cache button. First, open the Recycle Bin and scroll down the list of deleted files to make sure you will never again need anything in the Bin.