Right click the services you want to disable and select "Properties", then set the start-up type to manual to disable them. Open Control Panel, click Administrative Tools, and select Services. Disable all Services you do not use or need.To open Windows Task Scheduler, click Start, click All Programs, point to Accessories, point to System Tools, and then click Scheduled Tasks. To stop such tasks, use Windows Task Scheduler. Programs can also schedule unnecessary tasks to launch automatically when Windows starts.If you encounter problems after disabling some startup programs, re-open System Configuration and choose "Normal Startup" from the General tab.Click OK on the System Configuration window to save the changes.If you are not sure what some of the programs listed are, you can search them up online to see if they are safe to disable.In System Configuration, go to the Startup tab and uncheck any programs which are not required.Type "msconfig" and click OK to open System Configuration.Limit the number of programs that automatically start when your computer turns on. It is a free utility, though not a replacement for commercial products but can be helpful for removing some of the most common viruses infecting your system. If you have a really complicated virus infection, try using the Quick Virus Remover.You should also check Google Chrome which is noticeably faster and less prone to virus attacks from internet Chrome. It can speed up your internet experience. You are strongly recommended to use this option.
Firefox also has a cool feature to delete cookies, cache, and temporary internet files each time you close it. Check "Don't show this again" and click "Yes". It will prompt you with a "Set as Default Browser" message. It will allow you to import all of your Internet Explorer settings, and is much less prone to malware than Microsoft Internet Explorer.
Download and install Mozilla Firefox, Opera or Google Chrome."Windows Defender" is also included with other Microsoft services and products such as "Live OneCare" and "Vista." Also, Microsoft's Windows Defender is a widely-used anti-spyware tool that is currently distributed freely for users with a "Genuine" verified copy of Windows. If you do not have tools installed to protect against malware and spyware then you can download Spyware Blaster, and for viruses, download a free copy of AVG - " Anti- Vir Guard" or this one Avira - " Anti- Vira guard" ( all three of those are free "For Personal Use"), all three are also available in Business or Pro versions.
Update and run your spyware and virus software every week.
Read How to Remove a Virus to learn how to remove them and speed up your system. Spyware and viruses are leading causes of slowdown because you may have several spyware cookies or trojans that are taking up your processor time for reading and storing and reporting your activity to several spy databases.