It is possible that the infection you are trying to remove will not allow you to download files on the infected computer. If this is the case, then you will need to download the files suggested to another computer and then transfer them to the infected computer via a CD/DVD, external drive, or USB flash drive
If the infection is blocking the internet connection try
SUPERAntiSpyware Portable Scanner. All you need is a blank CD or a USB device. A CD+R is best as it is read only and can not be infected. Download to a clean computer and copy to the CD and place in infected computer. It is random named to prevent the malware from keeping it from running/executing.See--->http://www.superantispyware.com/portablescanner.html
That should give you enough control over the infected computer to use the next guide to finish removing Virus Protector. See
Bleeping Computer's Virus Protector Removal Guide
http://www.bleepingcomputer.com/virus-removal/remove-virus-protector
If Malwarebytes’ will not install see
http://forums.malwarebytes.org/index.php?showtopic=29028
OR--->http://forums.malwarebytes.org/index.php?showtopic=17607
Malwarebytes’ Tutorial(My Blog)
http://vmsar.wordpress.com/2010/02/12/malwarebytes-tutorial/
SUPERAntiSpyware(installed free version)
http://www.superantispyware.com/
When SUPERAntiSpyware will not install or run see
http://www.superantispyware.com/supportfaqdisplay.html?faq=71
SUPERAntiSpyware Online SafeScan
http://www.superantispyware.com/onlinescan.html
Eset Online Scanner
http://www.eset.com/onlinescan/
BitDefender Online Scanner
http://www.bitdefender.com/scanner/online/free.html