I received another 5 alerts in an hour
Indeed, depending on the antivirus/anti-malware system, it may detect various suspicious things because of TOR or may detect even malicious data (real or not) in the actual blockchain data. But since that data is never interpreted as something your computer would have to run, it should be fine.
why progress 0.10 % per hour ? so slow
Also as said, the blockchain is 425+GB in size, which means long download and also the need for a lot of disk space. If your internet connection is good, you have plenty of RAM and you have SDD (not necessarily for the whole 425+GB), some settings here and there can improve the speed a lot.
Even more, a light wallet like Electrum, which doesn't need the whole blockchain and synchronizes in seconds, may actually be the wallet you're looking for.
Just if you switch to that, make sure you also verify it.