Websites that deliver fake errors are often promoted using potentially unwanted programs (PUPs).
Research shows that most PUPs infiltrate systems without permission.
Remote access services are often legitimate and popular.
Some of the more popular ones include Team Viewer, Log Me In, etc.
After calling, users are asked to grant cyber criminals (who claim to be 'certified technicians') remote access to their systems via Fast Support (or another identical service).
These scammers then suggest that the system is infected and ask users to pay for removal of malware (that does actually not exist).
They then immediately start causing unwanted redirects to malicious websites, delivering intrusive advertisements, and gathering sensitive information. Some PUPs are free for anyone to download on their official websites, however, in most cases, these programs infiltrate systems without permission.
Developers proliferate them using intrusive advertisements and the "bundling" method.
Intrusive ads redirect users to malicious websites and execute scripts that stealthily download/install malware.
"Bundling" is stealth installation of third party apps with regular software.
If you gave access to connect to your computer to a suspicious third party agent, we recommend scanning your computer with a legitimate antivirus program, removing all the found threats, and then changing your passwords for online banking, email, and social media accounts, etc.
In this way, you can be sure that allowing remote connection to your computer will not result in identity theft, financial loss, and so on.