The symptoms you describe are indicative of a side effect
from the HDD Defrag family of rogue security programs
which changes file attributes to "hidden", making them appear invisible
so the user thinks some of their files have been deleted. Newer variants of the FakeHDD rogue delete Quick Launch and Start Menu items/folders and store them in a %Temp%\smtmp
Since you already ran ComboFix, the log should be reviewed in order to ascertain what was detected and removed.
Please read the pinned topic ComboFix usage, Questions, Help? - Look here
ComboFix logs, where should I post them?
When you have done that, post the required logs to include your ComboFix log
in the Virus, Trojan, Spyware, and Malware Removal Logs
forum, NOT here
, for assistance by the Malware Response Team Experts.
If you're not sure where to find the log, ComboFix will create and save it to the root directory, usually C:\ComboFix.txt
. To retrieve the log, launch Windows Explorer, navigate to the root directory and double-click on it to open in Notepad.