Slow reaction in vs2015

I have deinstalled 10.0.0.2249, in all editors (code, html etc.) not usable.
takes minutes after typing sth. until VS2015 reacts

Does this happen in all projects? All platforms? in code files or elsewhere?

Do you have any unusual VS plugins installed that could interfere?

This isn’t a known issue with our tools, especially not in v10 so we’d like to narrow down what’s going on.