Keep Your Antivirus Running and Upto date
Always use latest version of Antivirus in your Windows PC. Everybody know in Internet there are many type of virus and malware. If you run a good antivirus in your PC ,you PC is more secure and fast. So I suggest you download Microsoft Essentials in your PC. This is totally free by Microsoft.
Remove Programs that Launch at Startup
When you start your computer , Many programs are start automatically. These programs affect your boot process speed and system speed. You can stop these programs by running msconfig in run.
Remove Unwanted Programs by Uninstalling
Many times people install so many programs in computer. So I suggest you to remove unwanted software/programs in your computer by Uninstalling. Install only Important Software and never install software from Torrent sites.
Delete Temporary Files and Junk Files in Computer
When you install software ,browse the Internet, Play the Game and do any type of activity in computer, your computer make lots of temporary files in temp folder. If you want speed up your computer, so remove that files.
Download CCleaner Software for removing junk files.
Defragment Your HardDrives by Time to Time
Harddisk defragmenting is the most important thing if your computer data transfer speed is slow. You can do this task atleast one time a week.
So follow this guide and you can speed up your window 7 and 8 for Internet, gaming ,booting, perfomence, startup and more.