Sorry to hear you got infected with some sort of malware and1sc! Before you decide to do a re-install of your Operating System why not try "Emsisoft Emergency Kit" which is free to use. It has a good series of tools you can use to rid an already infected machine of malware. I keep a copy of EEK on a USB stick just in case.
It's also completely portable so you can install the program on a USB device without actually installing anything permanent on your PC. This can be very helpful because some types of malware won't let you install any new AV products on your hard drive. This has also proven useful in the past when helping out other people's infected machines. Just grab the USB stick & go to their residence.
The best way to use the Emergency Kit is to use a friend or relitive's uninfected computer, download the kit and install it on a USB device. Then plug in the USB device on your own computer and run the tools necessary to eliminate the malware. Worth a try before you take the drastic measure of re-formatting your OS I think! https://www.emsisoft...n/software/eek/
BYEDUS we don't recommend using any off-line installer package for a previous build of Immunet Protect because of the remote possibility that it may have been maliciously tampered with. Look what happened with CCleaner recently when several off-line installer packages were compromised by hackers!