Nope, I think you should try some other tricks which I have given here. Hope they works for you. If not, then do a format and reinstall.
Your computer runs slow due to different technical reasons. For instance, you may experience this problem when there are lots of services running in the background. The slow downs are also experienced when your hard disk and registry are fragmented. I'll suggest performing system maintenance tasks on a regular basis.
1. If you are running Windows XP or earlier version, then click Start. Select Run. If you are running Windows Vista/ 7, then press Windows Key + R.
2. Type "SERVICES.MSC" in the Open box, and press ENTER key.
3. Right click a service that you don't use, and select Stop option. Do the same for all other services which are not necessary for you.
4. Install Reginout registry defrag program. Click Analyze button.
5. When the registry analyze process is completed, click Defragment Registry button. Reboot your computer when you are done.
6. Click Start, select All Programs | Accessories | System Tools | Disk Defragmenter.
7. Select all the disk drives, and click "Defragment Disks" button.