Downloaded and installed the visual basic files but failed.
Even restore the computer twice but failed.
If I re-installed CC would I lose my catalog(s)?
No you won't lose catalog in that.
I reinstalled LR but now I have another problem.
I edited lot of pics yesterday and exited LR.
Today I opened LR and now the edited/modified pics do not show on my catalog.
How can I restore all the edited pics?
Presumably you have more than one catalog. Use the one that you edited yesterday. If you have reinstalled LR it may choose another catalog or create a new one. Just find your catalog and doubleclick on it to open it in LR, and then in Prefs tell it to use that catalog all the time.
It happens as a different catalog is open.
Open Lightroom and then choose File-> Open and select your previous catalog.