What speeds up a computer

Don't know any downloads but the thing is don't download anything otherwise you will get viruses & spyware so its better not to download anything otherwise you will have to pay for it

Another Answer
Without adding faster hardware there are some things you can do to make it faster.

Remove Viruses
Clean Temp Files
Fix Registry
Disk Defrag
Edit Startup
Change Performance Settings.
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1. Keep PC Away from Spyware
Spyware refers to the type of malware that is specifically used to privately collect your private or identity information for commercial purposes or bombard you with annoying ads toolbars. Spyware combines with hidden components that can silent gather your private information from the hard disks, track your online behaviors for gaining your credit card passwords for business gains. Once you have discovered the spyware is highly active on the computer, you may consider enabling an ultra- powerful and trustworthy spyware removal tool on your computer. If you are a Windows- based system user, you may consider installing the Microsoft Security Essentials on your computer. Microsoft Security Essentials serves as a free security service that is developed by reputable Microsoft PC experts to deliver real time and ultimate spyware removal and block solutions for keeping your PC away from parasites.
In addition, you can efficiently avoid spyware problems with the aid of the tips below:

• Only enable legitimate spyware remover on your computer
• Only enable third-party programs from trusted resources on your computer
• Perform tasks with tools from Microsoft as many as you can
• Do not offer your private information to a strange third-party website
• Do not enjoy videos from a site full of advertisement toolbar
• Enable the Windows auto-update utility

2. Tweak the Desktop
Once you finish installing a program on your computer, the installation wizard will help you locate the program icons on the desktop. As time goes by, the large bundle of icon files can drastically slowdown the system performance and make the computer run more and more slowly. You may wonder: How to speed up my computer free? Never mind. Create a new folder and shift the unwanted icon files to it and you will find out that the computer runs much faster.
3. Limit the programs at system startup
When you are asking the question" How to Speed Up My Computer Free?" you may have forgotten how many programs you have set to run at system startup. The more programs you require them to run at system startup, the more time the system needs to boot up. To increase computer speed instantly, you may consider limit some unwanted program to boot up at Windows system startup.
4. Clean up the registry
The problematic Windows Registry is the main cause for a slow computer. To increase computer speed, you should try all means to keep the registry away from tons of registry errors and undesirable registry files. To get back an error- free registry and totally remove the entire registry scam from your computer, you may consider enable a reliable registry cleaner on your computer. Why to enable a registry cleaner on your computer instead of repairing the problems manually? This is because any errors or problems generated through the repair process seem to result in further obscure system problems, including unexpected Blue Screen of death errors, sudden system shutdown problems, associated .dll file damage or drastic system slowdown.
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Solution One: Keep Spyware Away from Your Computer
Spyware refers to any technology that can infiltrate into your computer and secretly download undesirable advertisements onto your computer or silently gather your confidential information for obtaining illegal profits through sending them to remote servers. Once your computer is experiencing spyware problems, you may feel deeply annoyed by the problems listed below:
Blue Screen of Death errors
Software instability
Increasing times of browser crashes
Windows components removal failure
Browser hijacked
Adware bombard
Undesirable modification on system setting
Firewall disability
Unexpected system shutdown
Crucial system file damage
Undesirable system pops- up increase
More dangerous malware invasion
Drastic decrease of system performance
Third- party program install/uninstall failure
To speed up a slow PC and remove spyware from your computer, you may consider enabling a trusted spyware removal tool on your computer. Microsoft Security Essentials combines with a list of professional utilities which can help you detect, block and remove any sign of malicious software instantly and safely.
Solution Two: uninstall unwanted programs
Many software developers intend to set their products to run at system start- up for recovering development costs. The more programs you install on your computer, the more slowly your system runs. To improve computer performance, you should have to clean up the undesirable programs safely from your computer. To prevent any damage to your system, you may firstly consider enabling the Windows Add/Remove app to solve the problem:
For Windows XP user:
1. Click Start, and then go to Control Panel, double-click Add or Remove Programs icon.
2. From the Currently installed programs list, find out and locate the program that you want to remove, click Remove.
3. Click Yes to confirm the modification once any prompts pop up.
For Windows 7 and Windows Vista users:
1. Enable Programs and Features by clicking Start > Control Panel > Programs > Programs and Features.
2. Locate the program you need to uninstall, and then select Uninstall option. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Solution Three: Remove Unneeded Disk Files.
Once you successfully uninstall programs with Windows Add/Remove app, it is suggested to enable the Disk Cleanup utility to help you remove the associated program files:
For Windows XP user:
Step One: From the Start menu, click My Computer.
Step Two: In the My Computer, right-click C: drive, and then go to Properties.
Step Three: From the Properties dialog box, click Disk Cleanup. Select the check boxes next to the files that you need to perform the removal task, and then click OK.
Step Four: Click Yes to the proceed with this action, and then click OK.
For Windows 7 and Windows Vista user:
Step One: From the Start menu, navigate to All Programs > Accessories > System Tools > Disk Cleanup. Then Disk Cleanup will automatically scan your disk for files you can delete.
Step Two: Click Disk Cleanup, and then select the check boxes for the files you want to delete.
Step Three: When you finish selecting the files you want to delete, click OK, and then, to confirm the operation, click Delete files. Disk Cleanup then removes all unnecessary files from your computer.
Furthermore, the built- in Disk Cleanup utility also combines with the ability to help you remove unneeded files listed below:
Temporary Internet files
Downloaded program files, such as Microsoft ActiveX controls and Java applets
Files from the Recycle Bin,
Windows temporary files, such as error reports,
Optional Windows components that you don't use,
Installed programs that you no longer use and unused restore points and shadow copies from System Restore