All kind of windows based computers ( Including XP, VISTA, Windows 7, Windows 8, Windows 8.1 )
If you are looking for a software to download and install....
Some very helpful Soft wares:
CCleaner - CCleaner is the number-one tool for cleaning your Windows PC. It protects your privacy online and makes your computer faster and more secure. Easy to use and a small, fast download.
Rogue Killer -RogueKiller is a tool written in C++, which scans the running processes, and kills those which are malicious. It developed based on speed execution, which will clean the running processes before being killed, and on demand will clean the registry in order to make a faster and safer disinfection then with the usual tools. The tool does not remove files (except malicious .lnk in the startup folder), so you will have to clean then with MBAM (Malwarebytes Anti-Malware).
Malawarebytes - Malwarebytes is a relatively speedy malware remover, with the quick scan taking about 7 minutes and 30 seconds to finish even with other high-resource programs running. The heuristics engine proved on multiple computers during empirical testing that it was capable of determining the difference between false positives and dangerous apps.
Revo Portable - Revo Uninstaller is a freeware innovative uninstall utility much faster than Windows Add or Remove applet. With its advanced and fast algorithm, Revo Uninstaller scans before and after you uninstall an application. After the program's regular uninstaller runs, you can remove additional unnecessary files, folders and registry keys that are usually left over on your computer. Even if you have a broken installation, Revo Uninstaller scans for an application's data on your hard disk drives and in the Windows registry and shows all found files, folders and registry items so you can delete them.
Microsoft Security Essential - Unlike some antivirus software, Microsoft Security Essential is an unobtrusive security program that runs quietly in the background while using few system resources. It's effective at preventing most threats and updates automatically, making it ideal for beginning and casual users. However, this tool is not particularly effective at cleaning up computers that are already infected with malware or viruses.
360 Total Security - A Free Anti-Virus that gives you security as well as optimizes your PC.
For DELL Computers Use the following link to find out the direct number for the US system with the help of the service tag Click Here To Download the Latest Dell Support Center For Free, Click on the Link Below: Dell Support Center