Windows system registery has been updated and running multiple rundll32.exe
About two days ago, I downloaded a skin for Rainmeter (it was a .exe... I still wonder why I clicked on Execute) and since then, I'm being redirected to fishy websites and I can see in the Processes List that I'm running three Rundll32.exe (one of them is obviously a windows file because I'm allowed to open the file location) . I know for sure that the malware modified some files in the System32 directory because after installing the skin, my system did a reboot and started to update this directory.
I tried to reinstall Windows and using system recovery, but the virus is always preventing me from completing the whole process.
So far, I tried to use those softwares, but none of them are able to detect the malware: