What can be automated on Windows PC working 24/7?

Hi,

Thinking about it couple days. I have a Windows PC working 24/7, It could do automatic tasks and earn money instead of just consuming electricity and doing some work.

• Autosurfing - very low income, some of providers block such bot/autoclickers
• Ad clicker/email reader - same as above, $0.001 or even less
• Bitcoin mining - 20 Mhash/s is about $8.5/month
• Litecoin mining - a bit more but Litecoin is not popular at all

Please share your ideas, internet-marketing professionals.
I understand that nobody will share unique secrets but..

Thanks

what is bitcoin mining?

just turn off your pc you will save electricity

or

if you are living on rent then go for bitcoin mining or ad clicker or email reader