If your computer performance or speed has degraded, it could be a sign that viruses and trojans infiltrated your system. These viruses & Trojans runs in background, transmit data over internet thus chocking your bandwidth and affecting yor CPU performance.
The first step to be safe from Viruses & Trojans is to install a good Anti-Virus . Installing Anti-Virus alone will do no good, if you don’t update. Updating the anti-virus database, will help you to be safe from latest threats.
In addition to this, use an anti-spyware tool like SpyBot Search & Destroy (www.safer-networking.org). This tool finds malware and spyware which are commonly missed by the anti-virus.
The program creates a complete back-up of registry. This step is optional, but it proves to be a boon, if spyware corrupts your registry. SpyBot Search and Destroy can restore it to previous status. Start the process by clicking “Check for problems”. The program searches for any spyware or malware lurking in your system.
Immunize allows you to take preventive measures to protect your system from threats. Click on Immunize to see the possible ways in which threat can infiltrate in your system. Just give Immunize for Spybot to immunize these loopholes before the virus or hackers do.