Bitcoin Core goes totally out of sync after pc crash
Normaly first I opened bitcoin core to resume the process but now the Core is completely out of sync, and the blocks in bitcoin qt folder are using 60 GB of space which means they are already builded..?


The blocks on disk aren't really processed at all in the way you are thinking, what Bitcoin Core is doing when it is syncing is building a secondary database of its own which contains the state of the network. In a very unclean shutdown the database (known as the chainstate) will be corrupted and has to be rebuilt from the block files. There's no way to know exactly how it was damaged so it must be built entirely from scratch again. It is inconvenient but at least the blocks don't need to be downloaded again from the network again. 

If you are getting frequent BSOD you might need to check your hardware or drivers.