I suggest you find a empty working flash drive or make it ready. Go online and get HitmanPro 32 or 64bit version. Then run the "KICKSTART" option to make that flash drive bootable and become AV type ready. Thus, when you boot from it and have internet access(hi-speed) allow it to run. It will scan your system and check for any malware or virus, etc., follow prompts and allow it to work. It should clean/quarantine or remove threats. Once all done, released, etc., reboot and check the CL ads, etc., or run your own AV pgm. you have prior to that but do run the HitmanPro 1st to scan your PC.
I recently posted some items for sale. I had a suspicious response that requested far too much personal information. Since then I have been unable to reply to CL ads for help wanted or for sale.