A family member brought me thier computer because they were getting the FBI scam virus. I used Malwarebytes and AVG to scan the computer and those found/deleted 7 major viruses, Rogue and trojan stuff. I have experienced the FBI scam virus on one of my own pc's, but I never saw anything (on this computer) indicating that same issue.
However, I used SpyHunter 4 to scan the computer and it took roughly 40 hours to complete the scan and scaned nearly 8 million files. I didn't think anything of it at the time because I wasn't familar with the program.
That completed and it found 979 threats, but all were cookie and adware related. I couldnt remove them either without purchasing a version of SpyHunter.
So I used MSE and Malwarebytes last night. When I went back to the pc this morning, MSE was only 10% completed (after 8 hours and 700k files scaned). I took notice to what file/folder was currently being scanned.
It was C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\
Now I have a feeling that possibly the temp internet files are not being delete and instead being saved, which is resulting in insane scan times.
Im no expert, but having a scan last for 40 hours and scanning 8 million files seems abnormal to me.