MStudio 4005 not working after Keyrite loaded

[doransdome]

Need some guidance/advice here.

Had Mstudio 4005 up and working just fine. Purchased Keyrite and loaded. Immediately started testing and they worked together perfectly. Test done....shut down....came back a few days later.

Well now Mstudio won't open at all. Keyrite does.
I reinstalled Mstudio over the existing installation. Still not working.
I removed Mstudio from C drive, did a disk clean up and reinstalled as a new load. Appeared to install find but does not work.

What to do now??? Any ideas as to why it is not working??

YES, ALL WINDOWS UPDATES ARE UP TO DATE!!

Any help will sure be appreciated.