how to delete bad DLL files ?

[Dhanur]

hi
sometimes my explorer crash and i saw in event viewer that the crash is caused by
" QtCore_Ad_SyncNs_4.dll_unloaded ". just before the crash my mouse pointer start to lag.

details are given


Faulting application name: explorer.exe, version: 6.3.9600.17249, time stamp: 0x53e160b9
Faulting module name: QtCore_Ad_SyncNs_4.dll_unloaded, version: 4.8.2.0, time stamp: 0x50d3fca7
Exception code: 0xc0000005


Faulting application name: HostAppServiceUpdater.exe, version: 1.0.0.0, time stamp: 0x5438749b
Faulting module name: HostAppServiceUpdater.exe, version: 1.0.0.0, time stamp: 0x5438749b
Exception code: 0xc0000005

 

[photonboy]

This may point to system memory issues or a corrupted drive so difficult to say.

I'd start with MEMTEST:
www.memtest.org

Then run drive diagnostics (see manufucturer site and run DSL Drive Short Test to start...)

Otherwise I can only think to suggest reinstalling the OS.