There are currently 35 active miners. This is dynamic. It was 29 the last 2 days. Every day at 00:00 UTC everything (miner count, votes...) is recalculated in what we call maintenance time.
How to vote on Windows? It is actually simple:
Open a command line window by typing
into the search box or WindowsKey+R run dialog and hitting enter.
Then type
cd C:\Program Files\DECENT\
and hit enter.
Then type
and hit enter.
It will load and you will quickly be at a prompt saying locked >>>
At this prompt type
where your_password is the password you used to encrypt the local GUI wallet (the one you donwload and you can see the table with users, content... not DecentGO).
From here, you can vote for miners/witnesses and perform other advanced blockchain functions. This wallet does not use your DecentGO email address but rather the encrypted account name.
To use your account to vote for me as a miner/witness for instance, you would type
vote_for_miner your_encrypted_account_name jvper true true
(true twice because the first one means you want to vote and the second one means you want to broadcast to blockchain this vote)
If you want to know more about me, this is my miner proposition:
https://steemit.com/mining/@jvper/decent-jvper-miner-proposition