Sorry to hear about that. At least you can learn from it and now know how to better secure your funds for next time. If you don't mind me asking, how much in USD did you lose total?
Also, if you're just investing in lots of coins and not planning to spend them, there is no reason to even use wallet clients (I can only speak for the couple of alts I own, not all) - I have almost all of my funds stored in paper wallets that were generated on an offline computer that never has and never will be connected to the internet (old thing that doesn't even have wireless). Even if my main computer were to be completely taken over, the most someone would be stealing would be some random family photos, maybe my Facebook password, and some pron that they could just stream for free anyway.
I only keep a tiny fraction of funds in a hot wallet for spending, but at this point I mean can you even spend megacoin and all the others anywhere anyway? So no point keeping them hot.
How much I lost you can count from my first post. I wrote there how many and which coins I lost, it is also visible on screenshots.
Personally I didn't invested "that much", the coins just went extremely high from day I bought and if I would lost the amount (from my bank account) that their are worth right know, then it woud hurt me very badly.
I had encrypted wallets but right now on my newly installed os I also downloaded anti-keylogger.. Just in case.