Failed to load niScope_32.dll

Question

I had labview 2012 32bit installed on my PC(win-7) with all required (daq, scope & all other) drivers, and it was working fine. Suddenly labview was not able to load "niScope_32.dll" while loading my VI. I tried to repair it with same version of scope drivers(3.9.4) but problem didn't solved. I tried to locate niScope_32.dll i found it in C:\Program Files (x86)\National Instruments\RT Images\NI-Scope, when i browse & gave this location while loding VI labview gave error saying nipalp.dll was not found.
So I removed full labview and tried with clean installation (from NI CD) but same problem.
Then again I removed entire labview with all ni device drivers and installed labview 2013(downloaded from NI website)  and scope 4.0.5 drivers still problem persists. Even in NI-Max explorer it is showing NI-scope but I am not able to launch scope soft front panel, error "scope front panel could not launch because an error occured while trying to open application reference". Now I don't see any NI-Scope folder (or sub-folder) inside  "C:\Program Files (x86)\National Instruments" even after installing scope 4.0.5 !!!
I upgraded scope driver to scope 4.1, now a loading screen appers as attached pic & soft panel fails to load...
 any solution???

Answer 1

Can you think of anything that changed on your system between when it worked and stopped?  System update, NI Driver update, installation, etc.
No there was no system update, or ni update... But all I can think of is I had installed "prolific USB to serial" & "WinAVR" software , I uninstalled "prolific" one after error in labview ..
After error, when I connected to net ni labview & scope patch got resumed- downloading & updated in my system 
 Please post the MAX report here as well. Done attached
When you uninstalled NI-SCOPE, did you also uninstall DAQmx and NI-SCOPE runtime?  In what order did you make changes?  Normally, LabVIEW must be installed first, and then the NI-SCOPE driver.   
for 1st time i just repaired scope from windows control panel uninstall & change option, then I uninstalled scope & SCOPE runtime Reinstalled.
After that I uninstalled all NI products from the National Instruments Software Add/Remove entry in "Add/Remove Program" from the winows control panel .  Reinstalled Labview 2012 followed by all device drivers & scope from CD. Still same problem. 
Again I uninstalled all NI products (same way) then cleared all registary with help of ccleaner registary cleaner. Then I installed labview 2013(downloaded from ni-web but i am sure about it coz we had used same for other PC's & its working fine) followed by daq 9.4, scope 4.0.5 driver. 
-Malay