Hi friends!!
Below here is the System Configuration details to fix the problem
Case handled via Remote Support Session in year 2009.
[System Summary]
Item Value
OS Name Microsoft Windows Vista Home Premium Edition
OS Version 6.0 Service Pack 1 (Build 6001)
System Name JILL-PC
System Model Unknown
System Manufacturer Dell Inc.
Processor Intel(R) Core(TM)2 Duo CPU E4400 @ 2.00GHz
BIOS Version DELL - 42302e31
Windows Directory C:\Windows
System Directory C:\Windows\system32
Locale
User Name Jill
Time Zone Pacific Standard Time
Total Physical Memory 3061 MB
Available Physical Memory 1845 MB
Problem is associated with the Drivers for Ethernet and SM Bus controller which are crucial to run system effectively.
System is locking in between while work with any program. So these drivers should be either reinstall or updated with appropriate file.