No, simply installing an up to date anti virus software doesn't solve your current problem ! As I asked you in my previous thread, please provide the details of your computer configuration. Example:
- What is your OS ?
- What Service Pack do you currently have now ?
- What is the RAM ? etc etc ....
You can find the above information: Go to Start -> My Computer (right click) -> Properties !
My gut feeling is that you need an appropriate Service Pack to get rid of this problem. Don't just go for complete reformat before simply trying to install proper SP !
Please not to hesitate to ask me if you have any questions related to any basic information about computer ! Please talk to your computer helper installing Service Pack (SP) as early as possible! If he did, and if you did have a genuine copy of Windows OS then contact MS help-desk directly!
Please remember, buying an anti virus software, you are giving privileges to that software company to peek into your computer ! It is all businees, hope you will understand !
Please use a router, that way you don't need any antivirus software as much as possible. How it works is pretty simple: It is very difficult to detect the IP address of your computer through such device for hackers!
FYI :- AVG & AVAST both are equally rated GOOD!