Ok, let's solve this for you. If you have that many errors you have a spyware problem, not a virus problem. These are different issues and require differnet solutions.
First, you need to solve the spyware problem.
1) go to your browser and clear your browsing history, cache, and cookies...all that stuff
2) You have some type of security product already installed. While they want more money to update the database, the software itself is still good. Using this software, run a full system scan and "fix" the problems it finds
3) Run/enable Windows Defender, "fix" the issues
4) Go to
www.downloads.com and download malawarebytes and Ad-Aware. Be sure to select the free versions, be sure not to select the teaser ads that will cost you money. Run these, you can do them at the same time, "fix" problems.
5) Go to Start, all programs, accessories, system tools, and run disk cleanup. Do what it says
6) Download a new copy of AVG free and run it to deal with viruses
7) Ensure you have a firewall enabled, Windows is good if there is no interference
8) Run your disc defragmenter
If that doesn't do it, hire the high school kid next door!