To put your mind even more at ease, download and run the following software:Cure It!
from Dr Webb is free to download and run (for private use). On a reasonable system a full checkup lasts about 15 minutes (1 TByte spinning rust disk, about 50% full). Unless it finds malware issues on the system, then it will take longer, depending on how many malware is actually on the system and if you want the problematic files deleted, moved or cured.
Not a small download (200+ MByte) and nowadays you need to give your mail address, so have a disposable one ready. However, it really is very helpful when you are in need of finding/fixing malware. Usually the downloaded software works for a few days and then it tells you it is out of date.
Instead of downloading new signature files, you will need to download the whole thing again. It also generates a random filename after each download. There is more than enough malware/adware that is aware of file names from software that is able to remove malicious software and/or file names from software that allows you to see what is running in the background (like Process Explorer). The random file name will prevent malware /adware to block this software.
So, if you have software like Process Explorer on your system and you cannot start it, your system has been infected with malware/adware and you are definitely in need of software like ADWCleaner (free/private use), JRT, RKill and Cure It!.
** edit: additions