Every time I start unity it crashes. I’m running windows 10. The holding alt trick doesn’t work either. I found a way of getting in by right clicking on the unity icon and opening a recent scene but if it ever comes in contact with the Project Selection Screen it dies screaming. This is bad because now I need to start a new project and get files from the asset store which also causes it to crash. What do I do?
Ugh… so what do I do? 
Same here. CTD as soon as I launch. Doesn´t matter if I open from scratch or through a .scene file. I have reinstalled, cleaned registry. Now dloading and installing latest stable versions (0f1,0f2, betas), so far no success. If I install the 32 bit Editor it works fine. Conflict is with 64bit version.
Same problem. So maybe I should give the 32 bit version a try?
Please help same problem.
Same here.
Do you have Lavasoft Web Companion installed on your computer? Web Companion conflicts with Unity (64-bit) and causes similar home screen crashes. Lavasoft released an update which should resolve that issue, try updating or uninstalling Web Companion if you have.
i found a solution to this global problem you need to delete this directory C:\Users\YourUsername\AppData\LocalLow\Unity after deleting this my problem was solved completely,as i suspect this is somehow related to GiCache.
If this solution not working for you then delete this directory too C:\Users\YourUsername\AppData\Roaming\Unity