Pc crash when scanning

Hi all , just upgraded my Agv anti - virus too 2014 as my old Avg was due to expire in a view days, now when i attempt a whole computer scan , the scan starts for a few seconds then my sceen goes blue with following message :         STOP : c000021a { Fatal System Error }
                             The NT Initial command Process system process terminated.
                              tus of 0xc00000001 ( 0 x 00000000   0 x 00000000 ).
                              The system has been shut down.


                              Collecting data for crash dump …
                              Initializing disk for crash dump …
                              Beginning dump of physical memory.
                              Dumping physical memory to disk :  100

I'm running  vista on an old dell inspiron, however i've never had this happen before while scanning with AVG, everything else works fine , can still access internet and other programmes.

Any help would be much appreciated                         

Hi IAN,

In order to analyze it please provide us with diagnostic output (http://www.avg.com/filedir/util/AVG_SysInfo.exe) using this tool and please add detailed description of issue.

Thanks

Try running the scan in Safe Mode.  You could also choose "un-install" (have serail number ready just in case, and it should give you the option for "repair" without un-installing.  This has been my past experiences.  If that doesn't work, I would do a complete un-install and re-install.  It only takes a few minutes.  Get a fresh install from the AVG website.

Download Free Antivirus Software for PC | AVG Virus Protection

Hi, please try to run a full system scan in safe mode (usually F8 after ram check, see here-> Windows startup settings - Microsoft Support). Have you experienced a BSOD (blue screen of death) in safe mode?

Try running the scan in Safe Mode.  You could also choose "un-install" (have serail number ready just in case, and it should give you the option for "repair" without un-installing.  This has been my past experiences.  If that doesn't work, I would do a complete un-install and re-install.  It only takes a few minutes.  Get a fresh install from the AVG website.

Download Free Antivirus Software for PC | AVG Virus Protection

Hi IAN,

In order to analyze it please provide us with diagnostic output (http://www.avg.com/filedir/util/AVG_SysInfo.exe) using this tool and please add detailed description of issue.

Thanks