We are looking into the issue with some Intel GPUs on Windows 7 failing to launch the client. If you are experiencing this issue, can you please file a bug report with DXDiag included?
From what I’ve seen so far, it is a GPU driver issue, with the drivers being very outdated (7+ years in some cases). Unfortunately, Intel stopped supporting Windows 7 on many of these older GPUs so it is unlikely there will be an unofficial update.
We didn’t intentionally break this (of course!), but Windows 7 is getting more difficult to support due to issues like this 
. We’ll see if we can find a workaround.