Every time I open a project: error in gc - Get ThreadContext failed

Yesterday it worked fine, well I would get this error after ~10-20 min of using Unity but now it just wont open, everytime I try to open a project I get this error.

Currently using Unity 5.5.1f1.

I’ve tried uninstalling reinstalling Avast, Unity reinstall, revert to previous version (I still got this error), closed all programs that I didn’t need open.

Anyone know why this is happening?

Thanks in advance.

hello?

Hi,

I’m also receiving this message in a Windows 10 system with Avast, when I execute a Windows 64 bits build generated with Unity 5.5.2f1. The message occurs in an aleatory frequency. Already tried 1) to deactivate Avast for 10 minutes and disable “enable hardware-assisted virtualization” as mentioned in some foruns; 2) verify the “task manager” to see the cpu and memory use - normal; 3) run dxdiag: Diagnostics session shows the message below and i do not known what to do to fix it
Problem signature:
P1: 170330_game_winX64.exe
P2: 5.5.2.10711
P3: 10.0.14393.2.0.0

The build runs in another windows machine but I need run in these two machines.
Can someone give a tip to solve this problem?
Thanks in advance.