You'll have to download a suitable application that can be put on a flash drive, using another computer.
Hopefully the lappie's usb ports still work.
Download
Cureit to a flash drive (or you could burn it to a disk) and apply it to the laptop.
You may have to run it in safe mode.
Under no circumstances would I consider paying the ransom. All you'll end up with is a non-functioning antivirus and some happy pirates.
After running Cureit, download and run MBAM or SAS from the links above, and update/run it.
If you then still have problems with accessing control panel etc, download and run
Dial-a-fix.
If this all works, and restores your laptop to its former glory, you might want to re-assess the security apps that were installed, and consider changing them for better ones.