do NOT uninstall what you have to try to fix the problem.
See my post here
http://forum.cakewalk.com/tm.aspx?high=&m=2666716&mpage=1#2667255 1.5 does not get updated so don't bother trying ( The forgot to tell us that !)
I am still trying to recover from a complete 1.5 DP uninstall. ( will take hours)
On the Rapture issue I am in the same boat as you.
I am trying another install ( it takes for ever because all un compressed)
I did a custom install to my D: drive and there was no Rapture install afterwords ( per input form cakewalk early today)
If I get any break through I will let you know.
Finally got it to install. Took three attempts. (don't forget to re scan vsti's)
The installer default to the C drive I think so make sure you ahve more than 8 gig of space left.
Could not get pas a msvcr71.dll delete error code 5 in use, no mater what I shut down, but finally it went in.