avast blocksps at scaning svhost.exe

i have programversion 2015.10.0.2208
virusdb 150203-1

my system is windows XP professional ver 2002 sp2

if i selectROoTKITS quick check
the scan starts and the blocks the pc at 0%
the only way to get pc out of that state is tp brutally swich off and then swich on

any one has same problem

If you’re on a 32Bit system, update your XP to SP3 and try again.