Do you have another computer that you can download those programs to and then a flash drive to transfer them over to the infected computer?
If not, try booting into safe mode with networking by using the F8 method
. Don't use the other methods mentioned as it could cause more harm than good. The instructions can be found here
Once you are in safe mode with networking, try going to the links I posted above for Malwarebytes and SuperAntispyware. If you can then get them downloaded and installed, then do a complete scan using SUPERAntispyware.
The please post the SAS and MBAM logs if possible.
If it won't let you into safe mode by throwing a blue screen at you, just turn off the computer and then let it reboot back into normal mode.
Good luck and let me know if you have any questions as I'm happy to help.