Infected by new ransomware .Boop [Merged]

hi

first i want to say my english is not native so excuse me from the beginning

yesterday tried to install object dock and got a virus

they installed few programs and was able to uninstall but after that shut down my PC then most of my files from C and other two external HDD have the additional extension .boop

example:

0acec3abbb37mnyz.jpg.boop    BOOP File    61 KB    8/22/2020 8:17:25 PM
0f25e17c5407b77600f.jpg.boop    BOOP File    1,763 KB    8/22/2020 8:17:25 PM
1452679715245.gif.boop    BOOP File    47 KB    8/22/2020 8:17:25 PM
20180318_141106.jpg.boop    BOOP File    1,304 KB    8/22/2020 8:17:25 PM
20180318_141111.jpg.boop    BOOP File    1,299 KB    8/22/2020 8:17:25 PM
20180318_141120.jpg.boop    BOOP File    1,309 KB    8/22/2020 8:17:26 PM
2381206.jpg.boop    BOOP File    220 KB    8/22/2020 8:17:26 PM
2823347jRb02OMg.gif.boop    BOOP File    40 KB    8/22/2020 8:17:26 PM
28233533FQHAR7J8.gif.boop    BOOP File    230 KB    8/22/2020 8:17:26 PM
38.gif.boop    BOOP File    1,339 KB    8/22/2020 8:17:26 PM
399a175bd5461ef9c458f468d8e9b0c6.jpg.boop    BOOP File    55 KB    8/22/2020 8:17:26 PM
40.gif.boop    BOOP File    30 KB    8/22/2020 8:17:27 PM
42c03573aa7b.jpg.boop    BOOP File    59 KB    8/22/2020 8:17:27

etc….

also ‘’start task manager’’ was unable but solved by a friend of mine

however, a problem persists

one of the executable installed  and not find in programs and features was Garbage cleaner which i deleted 

tried to get Free Ransomware Decryptors but i could not find .boop fileso i guess this virus is new … or not

please, i kindly ask for help

i dont have Kaspersky installed or payed 

but i will soon as my avi, mp3, txt. and many other files will be decrypted 

then i must install a new windows

now i have windows 7. 64-bit

also, Microsoft Security Essentials detected 16 viruses (type) but one of them appears after restart each time

Trojan:Win32/Skeeyah.A

[Category: Trojan

Description: This program is dangerous and executes commands from an attacker.

Recommended action: Remove this software immediately.

Items: 
file:C:\Windows\system32\drivers\Wdf54067.sys]

again, please help and many thanks in advance

best wishes Carmen Tipa