My PC is totally screwed!

After a day at work, don't you just hate it when you get home to find that somehow, someone's managed to hack your PC and put on some evil malware trojan virus thing which just corrupts the system and causes you to spend more hours than you care to believe trying to undo their evil work! So to all you hackers and evil people who make these damn things, you really should stop! Don't you realise you're only fuelling the needs of these anti-virus software companies which makes them richer! So much for anti-capitalism or whatever you believe in!