No its safe to download even though some antivirus detects it as virus
No. Roblox has never hosted malware, but third party download sites may have stuff like toolbars or viruses bundled in with roblox. Official site is roblox.com
No, it's completely safe to download the client and studio. However, please watch out for people using backdoors with their models.
No it doesn't support malware or viruses but there are allot of ripoff robloxs and they don't support ordering dating swearing bullying ect
But they are slow beacuse there are a tiny group running Roblox the platform more of 1 million people on and you can gain money or robux (money I think)if you make a really good game like jailbreak 2 people made that game for college fee