Over the past one year, I have experienced that many of my accounts (Social media accounts, email accounts) were compromised. Which includes that the perpetrator changed the password/s, had full access to my inbox, was able to send/read messages.
I also noticed that my installed software's were tempered with. They all of a sudden started to give trial expiry warnings etc.
I did managed to enable 2 step verification for most of my accounts, but it seems like the hacker has access to my laptop and wifi in real time. And that hacker seems to control my laptop just like an administrator.
I did scanned my hard drives fully with Malware-bytes and Hitman Pro but couldn't find anything major apart from some cookies, malware registry entries, etc.
I have a very high suspicion that someone from the ISP (Internet Service Provider), a company that provide internet service is involved in this who knows the router password and settings.
I have windows 7 and windows 8 installed (on both different laptops). I am not able to upgrade to 8.1 due to some reasons at the update gets stuck for long time. And am planning to format my internal hard drives fully from scratch. (of both my computer).
I can also fully encrypt my hard drive with encryption software and can also enable EFS (Encrypted file system) once am upgraded to windows 8.1. But am not sure if these steps are enough to fully secure my laptop from wifi hacking.
So I would like to have some advice as to how can I make my laptops completely hack proof?? Which means that no expert can be successful in hacking it.
Would appreciate your advice/comments.