Hello
Were there any errors reported when you were installed CVI? Generally, when un-installing CVI due to wierd problems, I would recommend deleting the CVI folder from the program files folder, getting rid of the CVI Run-time files from the system32 folder ( the dll's should have names that start with cvi). Then reboot, and try installing it again.
I hope this helps
Bilal Durrani
NI
Bilal Durrani
NI