Hiya

It seem to be virus, but not trojan.

A trojan would not let you know when it is working.

For my point of view, you should restart your laptop, when it was just switched on, press and keep pressing the key F8 many times before the os be loading, access the Safe Mode

Then you might be able to have a full scan of your system by your anti-virus software, coz the virus/ torjan could not startup automaticly on the safe mode

Good luck