You can try running the Performance troubleshooter to find any issues that might slow down your computer. To do so Click the Start button > click Control Panel > In the search box, type troubleshooter, and then click Troubleshooting > Under System and Security, click Check for performance issues.
You can also try deleting programs that you don't use, defragmenting your hard disk, and using Disk Cleanup to delete files that you don't need.
Hope this helps!
Microsoft Windows Outreach