If the system shows unusual behavior (random pop-ups, unintended Chrome extensions, high CPU usage), consider that your PC may be part of a botnet. A full wipe and reinstall is the only reliable remedy.
Searching for "topfile.tj" specifically in relation to Windows 10 indicates that this domain is a file-hosting or software distribution site, typically used for downloading drivers, applications, or system utilities. However, it is not an official Microsoft resource, and users should approach it with caution. What is topfile.tj? topfile.tj windows 10