Hello, Welcome to BleepingComputer.
I'm nasdaq and will be helping you.
The HijackThis log is clean.
Please download and run this DDS Scanning Tool. Nothing will be deleted. It will just give me some additional information about your system.

Download DDS and save it to your desktop from
here or
here.
Disable any script blocker, and then double click
dds.scr to run the tool.
- When done, DDS will open two (2) logs:
- Save both reports to your desktop.
Please just
paste the contents of the
DDS.txt log in your next post.
===
Third party programs if not up to date can be the cause infiltration of an infection.
Please run this security check for my review.
Download
Security Check by screen317 from
here.
- Save it to your Desktop.
- Double click SecurityCheck.exe and follow the onscreen instructions inside of the black box.
- A Notepad document should open automatically called checkup.txt; please post the contents of that document.
===
Please let me know if you are experiencing any issue with this computer.