Scan your system files to check if they are working fine or having some errors. In case of damaged system files you can repair or replace them. It can be done by System file checker.
System File Checker is a utility in Microsoft Windows that allows users to scan for and restore corruptions in Windows system files. This utility is available on Windows 98, Windows 2000, Windows XP, and Windows Vista.
Follow these steps to use System file Checker:
1). Go to Run.
2). Type SFC /SCANNOW and click on ok button.
3). It will start scanning proccess and this process takes longer time, it can be more than 30 mins.
4). In case window having some problems, It will display some steps to follow. just follow those steps.