Call a Professional
This statement seems to be true for a lot of instances, but when it comes to computer problems, it makes a lot of sense.
I had a case recently, where the customer downloaded a bunch of utilities coming “uninvited” with a free Youtube downloader program… Coming along, a bunch of spywares and popups generators that corrupted his internet connection and made his computer experience suddenly miserable and frustrating. He decided to start removing the intruders one by one, using a “No mercy” removal tool… They apparently disappeard, but still no internet connection. At this point, he decided to call his service provider. Over the phone, the tech support made him writing new DNS settings, overriding the original ones, and turning off the automatic aquisition of DNS address by the computer. (which is Ri-di-culous…). This time the connection was really dead! Fortunately, he told me about it and I could set the DHCP service back to normal. But still no internet connection. At least I could start troubleshooting the problem in normal conditions. I ran a scan with my trusted Malwarebytes, and after removal of the numerous threats it found, and a restart, everything was back to normal and the connection was restored. With an early phone call, the problem would have been fixed in 20 minutes at most, and would have saved time and money to this customer.