NO, never run 2 Anti-Virus programs at the same time.
nope,it is not.never install two antivirus softwares in the same PC
Simply download the installer for the antivirus, then run it. With some antivirus software you don't even need to install it!
Install an antivirus software.
Computer
You can install anything on a computer. However if you want your antivirus system to work you need to have one working or none will.
Install an antivirus
... maybe you are not doing it right.
The sole purpose of antivirus software is protect your computer from viruses. Most antivirus programs nowadays protects your machine from more than just viruses, it also detects and removes worms, Trojans, rootkits, etc. If you don't install a good antivirus program on your computer, you may be infected and not even know it. Worse yet, your confidential information such as usernames and passwords to your bank account may be leaked and you will lose money to hackers.
Install the AntiVirus software and scan your computer. The AntiVirus prevents any kind of malicious software and viruses.
Fake antivirus sites using ie6 or ie7 to download it without permission.
How to install Panda Antivirus
Of course. When you download an antivirus software, you really download the installer of that antivirus not the program. When you double-click on it for install, only then the antivirus program will be "personalized" for that computer, and after that it can't be copied to another computer. When a software is installed some files will be copied in system's folder not only in that software folder.