I've noticed this with earlier versions as well, 1753 and 54
The install (1755) has been running for over 20 minutes and is especially slow at the "Uninstalling from VS 2010" part. The scroll bar is almost motionless. All instances of VS are closed.
I gave up and hit the Abort button but it is not responsive. It doesn't abort. How long should I wait for the abort to kick in before I kill the process?
After 5 minutes I went and killed the process. After restarting the install, got some weird messages, one saying it's going to add some random text to a folder location, then it finally completed after a few minutes.
I have a hi perf machine quad core 12GB RAM.