Hi, Recently I upgraded network provider from ADSL to NBN all under Telstra.Since changing my desktop ran slow and sometimes couldn't connect. Tesltra Technician contacted me to ask if they could run tests to determine what was wrong with our connection.We did this and to my horror and disbelief of the technicians we found 53,032 events which was severely impacting the performance of desktop.According to the Technician hackers placed some codes onto my desktop which was making the system slow and crashing on some programs. We tested the banking websites and found further errors. Telstra accessed my desktop with my permission and after several hours fixed it.Desktop now runs smoothly.I asked Telstra how can this happen.I run daily antivirus software which I believed was preventing others from getting access to my system. Telstra advice was to change from Firefox to Google Chrome and change antivirus software.Google Chrome is supposed to be safer however I heard this wasn't right.I have used Firefox for years now and keep it upto date.Currently I am using Scanguard Antiviris Software and use the VPN component daily when using the Internet. In addition I use CC Cleaner daily to clean up browser junk etc. I reported this to Scanguard and as yet have not had a response. I need to know clearly what steps I can take to prevent attacks on my system using Firefox.I used Norton before Scanguard but found after a few years the cost to maintain was increasing.Scanguard offered the same services for lower cost therefore I changed.Everything appeared to be working fine and when a potential threat was found Scanguard alerted and prevented access.This time it didn't work.Please advise.Kind regards Don

It’s very sad, but many software downloaders/ installers will trick you into installing not only their program, but other programs as well.

You have heard of the fine print in shady contracts, right? Well, some installers you need to look at the itsy bitsy teeny weeny fine print.

You are thinking you are giving the installer permission to install the program you want by using the recommended option. But if you use the Manual Option Instead, you discover all kinds of stuff that you do not even know what it is or what it does.

From now on, everyone needs to Use The Manual Option to put a stop to this.

Note that these programs can also change browser/computer settings.

Firefox is very safe. Also, having an antivirus is good, not all can stop malware.

You may have ad/mal-ware. Further information can be found in this article; https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no

Run most or all of the listed free to use malware scanners. Each works differently. If one program misses something, another may pick it up.